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Waste heat is a worldwide energy problem most people have probably never heard about. Every machine and power station, even renewable energy like wind and solar, creates heat that is simply lost in the atmosphere. Thankfully, scientists and engineers are devoted to capturing heat and transforming it into useful electricity.

Thermophotovoltaic devices (热光电设备) are one promising way to use this waste heat. University of Michigan engineers have created a precisely machined thermophotovoltaic cell that could be used to generate electricity from surplus renewable power. The cells would use heat stored in molten salt and turn it into electricity on demand, in a form that is much cheaper than batteries, say its creators.

One of the factors important to any device's thermoelectric efficiency is its material. If higher electrical energy can be created with smaller temperature differences, then the materials are said to have a high ZT value. And a new material created by scientists in Vienna has broken the ZT value world record.

Any new thermoelectric material has to have a distinct advantage, and research is identifying a number of promising products. Pyroelectric films (热电薄膜) are aimed at waste heat emitted at less than 100 degrees Celsius (212 F) and can generate electricity when a material is either heated or cooled.

Low-temperature generation includes computers and cars, making pyroelectrics particularly useful for squeezing more energy out of electronic systems.

Another relative advantage is inexpensive materials. More abundant elements like tin, selenium, and magnesium are cheap and abundant, with high ZT values when combined in the right way. Their use could lead to greener car engines and industrial facilities.

And when it comes to personal electronics, thermoelectric could eventually see off traditional charging hardware. Chinese researchers have built a wristband that gathers body heat to power a LED and may be able to power smartwatches or other mobile devices in the future.

My passion for the field of dietetics (营养学) started at a very young age. Ever since I can remember, I have been dreaming of becoming a pastry chef.

I grew up being part of various sports teams. As I grew older, I noticed how food influenced my performance as an athlete. I started reading more about nutrition and signed up for an introductory nutrition course during my first year of college.

However, I noticed when I entered my dietetics classes, that I looked quite different from most students. I was the only ethnically diverse student in my classes.

My mom was born in Austria and my father in Iran. They met in Austria and moved to the U. S. before my brother and I were born. They exposed us to their own traditional cultural foods, and I grew up eating a fusion of Iranian and Austrian dishes.

I remember never having a taste for school cafeteria food, so I always requested my mom pack me lunch. She would pack me leftovers from dinner, such as a kuku sabzi, a Persian egg and herb frittata, or schnitzel with dartoffelsalat, a customary Austrian dish of fried breaded chicken. At times, I felt embarrassed about my meals, and would hide these from my peers to avoid the horrible question of, "Ew, what is that?" However, over time, and once I became a qualified RD (注册营养师), I realized my unique background allowed me to connect more deeply with others from different cultures.

I encouraged my clients (客户) to share what they grew up eating and what foods were customary to their unique upbringing. I developed nutrition recommendations for my clients that included traditional staples from their heritage culture. These experiences and my dual heritage background empowered me to encourage my clients and other RDs to proudly share their unique cultural foods, to stop feeling embarrassed, but instead embrace our differences and increase cultural awareness in the field of dietetics.

Top universities in the Young University Rankings 2023

Paris Sciences et Lettres—PSL Research University, Paris, France

PSL is a collegiate university formed in 2010 with the aim of becoming one of the world's leading research universities. It was originally made up of five institutions but has since grown to incorporate 25 self-governing academic and research institutions.

The university aims to boost research output from France and has developed strategic partnerships with Technion Israel Institute of Technology, among others.

Nanyang Technological University, Singapore

Nanyang Technological University, Singapore is one of the highest-ranked Asian universities in the The World University Rankings. The university was established in 1991.

The university has 25,000 students from more than 100 nations. NTU also has strong ties with many institutions across the globe, including Peking University.

The Hong Kong University of Science and Technology, Hong Kong

HKUST consistently ranks as one of the best universities in Hong Kong as well as being in the top 100 in the world. As its name suggests, HKUST focuses on providing students with a high-quality education within the realms of science and technology.

The university was established in 1991 and, in 2022, it introduced a scheme called HKUST 2.0, which covers its plans for development in the future.

Ulsan National Institute of Science and Technology, South Korea

UNIST is a warm and welcoming post-secondary institution located in the heart of South Korea's largest industrial city, Ulsan.

Since its opening in 2009, UNIST has grown to become a world-class university, with a rapidly growing reputation for its research and impact on a wide range of fields. UNIST's research facilitics, along with its world-class laboratory and state-of-the-art research equipment became an envy of many scientists around the world.

It was the last day of school, and the long year spent in fourth grade had finally come to an end. It had rained heavily all day, and by the afternoon it became chilly. The sun had dipped below the horizon (地平线) as I got home soaked (湿透) and cold. I rushed into my room and slipped into some dry clothes. Once I had changed, I joined my mother in the kitchen. She had already lit the fire to prepare supper.

The wood soon caught fire, and the warmth spread around the room. I tried to get closer to the fire as my body was shivering with the intense cold. My mother gently rubbed my back and said, "I am proud of you, my little hero," as I told her how my schoolwork had improved. I remember her bright smile and the joy in her eyes.

My mother started humming the lyrics to one of my favorite songs, "Heal the World" by Michael Jackson. I immediately began to sing with my mother. We would always sing songs like this together. My mother knew how much I loved singing. She always felt sorry that she couldn't afford to pay for music classes for me.

Life was not easy for us during that period. I was living with my mother after she separated from my dad, which happened the year before when I was in third grade. Sometimes the nights were tedious (单调乏味的) and tiresome as we did not have a television and the batteries in our old radio would often run out. However, I enjoyed the 20 songs that my mother and I sang together. As she hummed the tune and I sang along, I dreamed of a world where performing on stage would be the pillar (支柱) of my life. The turning point of my childhood came after the end of fourth grade. Our neighbor moved away and left his old piano to us.

注意：

1. 续写词数应为150个左右;

2. 请按如下格式在答题卡的相应位置作答。

My mother was so happy that she could teach me singing at home with this piano. 

The next term, I became the lead singer of the school chorus, which was one step closer to my dream of becoming a singer and inspiring people with my voice.

1. 野生动物的重要性;

2. 保护野生动物的倡议。

注意：

1. 词数 100 左右; 

2.可以适当增加细节，以使行文连贯。

Joel Boyers and his wife, Melody Among, were heading home in their helicopter (直升机）when he received a call for help from a stranger. The caller's brother and her1 were trapped on their roof in Waverly because of the rising floodwater.

The caller2 Joel Boyers to come to their aid. Boyers looked west towards Waverly at the storm clouds. Aware of the danger to3 in such bad weather, though, he4 put the brother's address into his5 . Soon, he and Among were in the air,6 for what they were about to see in Waverly.

Upon arriving he found the water below was7 . People were holding on to anything that didn't move—roofs, trees. The flooding also8 cell phone service, meaning Boyers couldn't use his phone to locate the9 he was looking for. He flew on anyway.

As Boyers drove the helicopter, Among began10 people on roofs and bridges—anywhere Boyers could11 and get them onboard. A rescued man pointed to a teenager. The teenager held onto a branch with one hand and the other held a dog she'd saved earlier while both were12 in the current (水流). With no place for Boyers to land, he13 the helicopter until it hovered (盘旋) just above the water line. The rescued man jumped out and swam to the tree, where he helped the teen and the dog to the14 .

Though the experience was 15 , Boyers admitted it was fun.

Now more companies are experimenting with the concept of connected clothes. Among the pioneers is London based Cute Circuit, which has been creating fashionable smart clothing since 

2004. The company's latest innovation is the "Sound Shirt", which allows deaf people to "feel" live music by transforming the tunes into touch sensations (感受) in real time.

The fashionable jacket uses software that changes the music into data and wirelessly sends it to the 16-micro motors fitted inside the clothing's fabric (布料). The devices shake with the intensity (强度) of the music being played, allowing the wearer to feel each instrument individually. For example, violins can be felt on the arms, while the deeper, heavier bass notes can be felt close to the stomach. The series of touch like sensations across the wearer's body enable him or her to feel the entire music, resulting in a musical experience.

To ensure the shirt is comfortable, the designers chose to leave out wires and instead wove conductive textiles (导电纺织品) into the garment's fabric. Francesca Rosella, chief creative officer of Cute Circuit, explains, "There're no wires inside, so we're only using smart fabrics — we have a combination of micro-electronics and very thin and flexible and conductive fabrics. All these little electronic motors are connected with these conductive fabrics so that the garment is soft and stretchable."

Cute Circuit, which has been testing the Sound Shirt for three years, expects to make it available to the general public shortly. Priced at $3,673, the smart jacket won't be cheap. However, twin sisters Herman and Heredia Breanne, who lost their hearing at a young age, believe the hi-tech garment is a worthwhile investment, especially for deaf people with a passion for dancing. "It's almost like feeling the depth of the music," says Herman. "It just feels as though we can move along with it."

Given the crowds of visitors and many attractions at the Disney parks, it's easy to get lost. Thankfully, you will always find a worker to point you in the right direction. When you do, you just might start to notice something unique about their body language—and it's just one of the many secrets Disney employees won't tell you. 

Cast members, as park employees are called, are taught in their training to always point with two fingers instead of one. The first reason for this is that pointing with just the one index finger(食指), as most Americans do, is considered impolite in some cultures and countries. The Disney parks have always attracted many international visitors, so the friendlier two-finger gesture became the norm among employees, in an effort to be sensitive and welcoming to every person. Employees have even affectionately named it "the Disney point". Michaela Paris, a former Disney employee, said the Disney point is a sign of respect.

"Disney receives plenty of foreign travelers to their parks. The typical single finger point is a symbol of disrespect and has a negative(负面的) meaning in many cultures. Therefore, Disney created 'the Disney point' to accommodate all of their guests, " Paris said. 

Other sources say this way of pointing is related to Disney himself. According to the Huffington Post, it's actually how Walt Disney himself used to point things out to visitors, because he usually had a cigarette balanced between the two fingers. You won't find cast members today smoking a cigarette—there's no smoking allowed for anyone, employees or guests, once you are inside the entrances at Disney parks—but the tradition of pointing with two fingers still stands. 

Keep an eye out for the statue of Walt and Mickey doing "the Disney point" next time you're at Disney World. Meanwhile don't miss other such rules that all Disney employees must follow.

I am rather good at using maps. But I forgot the maps and here we were, late afternoon, last day of holiday, my daughter, my cousin and I, driving along a two-lane highway in Oregon. No other car in sight, and the sun had just gone down. Where was that sweet little village?

It was supposed to be right along this river. We drove on, farther into the unknown river always at left as our guide. We kept passing farms and fields and now a few lights were coming out. In my head, I was doing a lot of self-criticism: Why didn't we start earlier, bring the map and so on? My cousin and I were both impatient and stressed. My daughter, at least, was happy in the back seat, texting a friend. I pulled up on the shoulder of the road to think.

Just the — Wow! Amazing! A new scene appeared. Where did it come from?

Right there, out of nowhere: a magical misty landscape. Fields stretched in silent purple, with rows of tall trees, darkening in the dusk. I turned the car engine off. All was silent in the hot summer air. Beside us, a plum-covered river hardly moved between a border of trees, its dark lazy water reflecting the last light of day. 

How breathtaking! Where had it been? If I had seen even a bit of beauty while driving along, I could have stopped and taken a look. I had missed it all. 

We miss a lot, almost everything, in fact, in our world. Our task-focused filters (过滤器)takes care of that, selecting only what we need. We need to get to work. Have some lunch. We see what we need to see, often for purposes of survival. Gregory Bateson, speaking of beauty, said the judgment is selection of a fact. In our daily lives, who or what is doing the selecting? Can we make a change? Can we see further?

Rome can be expensive for travelers, which is why many choose to stay in a hostel (旅社). 

Yellow Hostel

If I had to make just one recommendation for where to stay in Rome, it would be Yellow Hostel. It's one of the best hostels in the city, and for good reason. It's affordable, and it's fun without being too noisy. As an added advantage, it's close to the main train station.

Hostel Alessandro Palace

If you love social hostels, this is the best hostel for you in Rome. Hostel Alessandro Palace is fun. Staff members hold plenty of bar events for guests. There's also an area on the rooftop for hanging out with other travelers during the summer.

Youth Station Hostel

If you're looking for a clean and modern hostel, look no further than Youth Station. It offers beautiful furnishings (家具陈设). There are plenty of other benefits, too: it doesn't charge city tax; it has both air conditioning and a heater for the rooms; it also has free Wi-Fi in every room.

Hotel and HostelDes Artistes

Hotel and Hostel Des Artistes is located just a 10-minute walk from the central city station and it's close to all of the city's main attractions. The staff is friendly and helpful, who will offer you a map of the city when you arrive, and advice if you require some. However, you need to pay 2 euros a day for Wi-Fi.

While they are at home alone, many people imagine  (have) the opportunity  （sing) together, which  (realize) by a virtual choir. Anyone can take part in  from anywhere and does not need a studio. It  (prove) to be a positive influence on the lives of many people. Award-winning composer and conductor Eric Whitacre came up  the idea of the virtual choir,  began studying music in 1988.  (finish) university in 1995, he received a master's degree in  (music)composition in 1997. In 2009, his first virtual choir received,  (million) of views on the Internet. The virtual choir has become a worldwide phenomenon since then. In 2014, he formed the Virtual Youth Choir for UNICEF, and 2, 292 young people from 80 countries sang his song"What If".

take part in; join in; come up with;graduate from; lead to; remind...of; add to