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In Florida's Everglades, few species are more closely tied to the habitat's health than an endangered bird, the snail kite. The Everglade snail kite eats just one thing: snails, a species that relies almost entirely on a resource usually abundant in the freshwater marshes (沼泽).

Over the last century, as much of the Everglades dried up, droughts contributed to the snail kite's decline, and by 2007, there were fewer than 800 remaining. But the kite has bounced____back recently thanks to an exotic(外来的)snail. It's a rare case of an invasive species having a positive impact.

Robert Fletcher, a University of Florida professor who directs a snail kite monitoring program, said the invasive species was first spotted in 2004. Within a few years, it had expanded through much of the Everglades. "And it was around that time," he said, "that we started to see snail kite number increase."

No one's sure about how the exotic snails were introduced into the Everglades. They're related to Florida's apple snails and are commonly used in home aquariums(鱼缸). The invader, the island apple snail, is larger than its Florida cousin. It lays eggs in the thousands visible on the stalks (茎) of many of the marsh plants.

Efforts to restore Florida's Everglades have helped the snail kite and restored native vegetation. It's been in the works for more than 30 years with a cost of more than $20 billion. But progress is increasing gradually, although hard to measure. In the meantime, scientists say the invasive snail may have helped pull Florida's endangered snail kite back from the threat of extinction.

But Fletcher is concerned about the potential impact the species will have on the Everglades over the long term. He said, "What we should be thinking about is how we restore native snails to get those benefits rather than relying on this non-native species that can have damaging impacts on the ecosystem." The invasive snails may already have caused losses to some native marsh plants, indicating that trouble may come very soon.

In times of distress, a friend would always suggest going for a walk. "Are you overwhelmed by your work? Take a walk around the neighborhood." Comments like this are often said with nothing but the best of intentions. but they used to make me angry as much as being told to drink more water. I did not understand how these things were going to help.

Three years ago, I hit a low point. Once I saw a pair of empty eves looking at me through the mirror, I knew I was at my breaking point. So I took the advice I fought so hard to ignore. I went for a walk—with the hope that it would somehow change my life.

I embraced the fresh air everyone seemed to be talking about. But it did nothing. I was just as sad as I was before. I went on a walk every single day for more than a month. Some days I could barely make it outside, but I managed to push through. I took a picture every time I went. I think I wanted to document myself trying to make an effort.

One day, the unthinkable happened. I found myself smiling. I realized I had patiently waited all morning to go on this walk. What I once hated had become the best part of my day. I found myself longing to be outside. I never had a destination in mind. I just danced along the trails, stopped to look at the beautiful blue skies and listened to music.

I'm glad I took pictures because there was a noticeable difference in my face. I slowly started to look less tired and defeated. I don 't know why I refused to go on that walk for so long. I guess I didn't want to believe that something small and seemingly meaningless could actually make an impact on my physical and mental well-being.

If you're having a bad day, a bad month, a bad year or even a bad life, you should try going for a walk. Sometimes, all we need to do is try.

Each year, Boston University proudly celebrates the very best in academics, innovation, and teaching through the awarding of University-wide honors and in our support of applicants for prestigious(赫赫有名的) national scholarships. The following showcases the growing list of opportunities and resources Boston University provides. 

Harold C. Case scholarship

The Harold C. Case scholarship is offered to outstanding Boston University juniors for support of their senior year. Case scholarships recognize scholarly accomplishment and potential as well as extracurricular activities that contribute to the university.

Scholarship recipients receive between $1.000 and full tuition depending on financial needs. Funds can only be applied to undergraduate study. In most application cycles 10-12 recipients are selected.

Dean Elsbeth Melville scholarship

The Dean Elsbeth Melville scholarship was established in 1978 by the Trustees of Boston Univrsity to honor Dean Melville's "splendid and varied contribution" to the education and lives of women at Boston University. Only two scholarships are awarded each year to top-ranked women in the junior class who are representatives of the qualities stressed by Dean Melville.

Scholarship recipients receive a minimum of $1,000 depending on financial need. Funds can only be applied to undergraduate study.

Clare Boothe Luce scholar awards

The Clare Boothe Luce program of the Henry Luce Foundation supports a limited number of Undergraduate Scholarships for women students in the fields of the physical and life sciences, mathematics, engineering, and computer science.

Provost's scholars award

The Provost's scholars awards celebrate the achievements of students who have demonstrated the spirit of a true scholar at a research university. Up to 20 awards are given annually, each carrying $1000 of funding for research creative activity expenses such as travel to conferences and archives (档案馆) or for research-related equipment and supplies. Awards are distributed through the Undergraduate Research Opportunity Program (UROP). Winners are selected in the Spring Semester, and recognized at the Provost's academic awards ceremony during Parents' Weekend in October.

In high school, I was a straight-A student, a member of many school clubs, and a receiver of many rewards.However, I had been subjected to(受到....磨) peer pressure. Wanting to be"Cool", I started going to parties and drinking, drunk beyond recognition. My life took a tur for the worse. However, the experience in one summer program taught me a lesson: never do something you believe is wrong just to gain the approval of others.

In June, I worked part-time at a restaurant. The day before I left for the program, one co-worker offered me his driver's license, telling me to have fun in Quebec since we two almost looked the same. I'd seen friends walk into liquor( 酒) stores with fake licenses and come out carrying a twelve-pack of beer, smiling proudly. So I took the license, but I promised myself that I wouldn't use it. However, I easily got carried away.

On the first night of the program, while walking around, my new friends and I came across a liquor store. Kai asked if anyone had a fake license. After everyone shook his head, I cleared my throat and declared,"I do."With everyone"s admiration and Kai's twenty dollars and instruction, I boldly agreed to take on the task without thinking.I managed to buy a case of beer. The boys cheered and gave me pats on the back."You're the man,"someone said to me. The praise boosted my self-confidence.

The last night there was a party. A few of my friends insisted that we drink before the dance. They asked me,the "ID man,"to buy alcohol. To cam their admiration, I took the cash and bought what they wanted. Later that night,I was enjoying myself when Kai said nervously,"Cristian isn't okay."Worried for my friend, I went to assess the situation. Clearly, Cristian was overly drunk and almost unconscious.

注意：1.续写词数应为150左右:2.请按如下格式在答题卡的相应位置作答.

Paragraph 1: Suddenly, something went wrong: Cristian fell to the ground.

Paragraph 2: The next day, I was called to the program director's office.

注意：1.词数80左右；
2.可以适当增加细节，以使行文连贯。

Pan Yuzhen, a 77-year-old embroiderer( 刺绣工), was (thrill) to do the catwalk show in her hand-made Miao costumes last week in Guiyang, capital of Southwest China's Guizhou province.

the opening ceremony of the 17th Guizhou Tourism Industry Development Conference held on April 6,a fashion show(feature) local ethnic cultures drew(round) of camera flashes capturing images of the delicate Miao embroidery on the (late) collection.

Pan, of the Miao ethnic group, (come) from Taijiang county, Qiandongnan Miao and Dong autonomous prefecture. She learned the embroidery art from her mother atage of5 as an ethnic tradition.But it was beyond her expectation that the folk craft could present itself on stages at world- famous fashion weeks as it does nowadays andthe embroideries created by her could one day(spot) in the daily lives of families across China as household products, which is now the case.

Pan has been to five foreign countries, including the United States, France and the United Kingdom."Foreigners love our embroideries. They are even willing to queue hundreds of meters long at Christmas, just(buy) an embroidered notebook or ornament for their families," she said.

With the start of new school, most freshmen were excited to meet new classmates and teachers. Among them,1 , 15-year-old Sergio Peralt a was feeling very nervous because his right hand had never fully formed since he was born. Sergio was particularly concerned about2 his classmates would think of him.

Jeff Wilkins, the teacher of Sergio's engineering class,3 out Sergio's situation and decided to do something for the new student. He hoped to4 this hands -on chance to help his robotics students learn more about engineering and how building a robotic hand5 .

For the next four6 , Jeff and his class including Sergio worked on the7 .With access to online models and a 3D printer, they8  created a robotic hand, which was intended to look9 and work well, like catching something.

Then came the final testing day The whole class10 in the science classroom, watching breathlessly as Sergio carefully11 the self-made robotic hand and caught hold of a ball with his arm12 slightly.Never in his life did he expect to catch something with his13 hand!

The life-changing gift for Sergio drew huge attention. Jeff and his students became an instant14 and various media competed to15 the news. His students stated that Jeff challenged them to transform abstract concepts into reality, from which they benefited greatly.

Five Tips For A Happier Life

Here are some scientifically proven but simple ways to cultivate contentment.

Help other people. Whether lending a hand or offering a handout, giving to others has been found to make you feel better. A study from the University of British Columbia found that people who spent money on gifts for others or gave to charity reported being happier than people who spent cash on themselves. . And there's a big bonus: giving your time to help others is also associated with better health.

Listen to music. , according to research from the University of Missouri, especially if you actively try to be happier when you're listening. Psychologists from Goldsmiths, University of London also found that people who listened to positive music judged a grey square to look brighter than it actually was.

. You might need to listen to cheerful music to improve your frame of mind, but it's not the same when it comes to movies, according to academics at Ohio State University. Watching a tragic film appeared to make viewers reflect on their own relationships and realize how much better off they were than the characters in the movie.

Meditate( 冥想). Mindfulness meditation which focuses on experiencing the here and now has been shown to increase feelings of contentment. What's more, researchers from Massachusetts General Hospital in the US looked at brain scans of 16 people who took part in an eight- week mindfulness meditation course and found changes in the brain. .

Go outdoors. Numerous studies have found being outside is an effective pick-me-up.  But best of all,according a University of Sussex and LSE study, is a visit to the coast. Researchers asked people to log their happiness levels on a "Mappiness" app and being by the sea on a warm weekend day came out top.

A. Watch a sad film

B. Go to movies with friends

C. Optimistic music can have a positive effect on our well-being

D. If it's a green space, even if it's just your local park, that's better still

E. They indicated less stress and heightened self-awareness and compassion

F. Volunteering can make you feel good too, according to a number of studies

G. Simply write down the little things you're grateful for, whether that's a nice cup of tea or spotting a pretty bird in the garden

Virtual reality (VR) is already widespread in various fields. But while vision and hearing interfaces(接口) are extremely advanced, and touch, or "haptics,"Is improving, one key sense has been missing from the virtual world:smell.

That may be about to change. Engineer Xinge Yu of the City University of Hong Kong and his colleagues have developed a lightweight, flexible and wireless smell interface that can precisely deliver smells such as pineapple or green tea to VR users and more fully immerse them in scented virtual worlds.

Previous smell interfaces have typically used bottles of liquid perfume, an atomizer (a device that turns liquids into a fine mist) and some method of blowing the atomized droplets out. This works, but it is rigid and has limited operating time between refills, and it does not easily allow for controlling intensity. These drawbacks have made the devices less practical for VR systems.

The new design uses small wax pads filled with scents that are heated by an electrode(电极) to release a smell.A thermistor senses the temperature, which controls the smell's intensity. The study describes two different device formats. The first is small enough that it can be stuck to a user's top lip, but it includes only two smell generators.The second is worm like a face mask and has nine. Both are customizable with a selection of 30 smells, including ginger, clove, mojito and coconut milk. Different combinations can be blended at varying intensities to create thousands of possible fragrances.

The study includes demonstrations of possible applications beyond just enhancing VR， including communicating messages by smell and arousing emotions. The researchers suggest the devices could even be used to cease depressed mood or promote recall in people with age-related cognitive decline."Scent is directly connected to the emotional and memory parts of the brain, so there are a lot of applications related to well-being and health,"Amores says.

On June 15, the 100-day countdown to the Hangzhou Asian Games, the medal of the 19th Asian Games was released. The medal of the 19th Asian Games is named Shan Shui, which is another core element of the Asian Games, along with the official emblem(微章) Tides Surging, mascots Congcong, Chenchen, Lianlian, color system Meeting the World and torch Eternal Flame. It is an important addition to the overall aesthetic of the event.

Shan Shui is characterized by the ceremonial jade (玉) Cong in the Liangzhu Culture (5,300BC-4,300BC).This square jade, integrated with a round medal, is truly unique and highly recognizable.

Shan Shui presents the geographical features of Hangzhou. By using prominent lines, the picture scroll of Hangzhou is outlined on the front side of the medal with misty hills on three sides and the city on one side, a rippling lake, and wavelike mountains beyond. The back side is shaped like a square seal, which means the athletes leave a beautiful mark on the Hangzhou Asian Games,

Shan Shui expresses the character of Hangzhou as the capital of ecological civilization, with natural landscape,clear water and green hills, creating invaluable assets, casting gold and silver medals.

Shan Shui shows the sportsmanship of climbing the heights. Reaching the top, one will become even higher.On the way to the summit, athletes strive hard, challenge themselves, and overcome one peak after another.

The medal will be made by painting, milling, trimming and polishing, gold and silver plating effect treatment,and protection treatment. The medal ribbon will be hand-sewn on both sides using weave technology and environmentally friendly printing techniques. The bridge shaped buckle at the top of the ribbon highlights the Jiangnan characteristics of the water town and the bridge town. The linking method adopts the raw ear structure of the spring buckle shaft(弹簧扣轴) to fix the ribbon inside the medal.