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Biodegradable (可生物降解的) food packaging could remind people of spoiling (腐烂的) food by its changing color. 

Bst-before labels (保质期标签) are often poor predictors of when food becomes dangerous to eat, which can lead to waste and food poisoning, says Benedetto Marelli at the Massachusetts Institute of Technology. So, he and his colleagues tried to create wrap that can react to changes in food. 

They made four films (膜) similar to plastic wrap, each consisting of two layers (层) . One layer was made from a protein obtained from silkworm silk, while the other was made of one of four so-called covalent (共价的) organic frameworks (COFs) . These materials contain carbon and hydrogen, as well as atoms like oxygen or nitrogen, all arranged in a grid (网格状) that makes the material porous (透气的) . 

After checking the films were strong, the researchers tried to compost (堆肥) them. For the best-performing film, 50% of it degraded after being placed in soil for 30 days, which is comparable to existing biodegradable plastics. 

The material also changed color when put in liquid with different pH values, due to the COF layer's interaction with the liquid. Because the pH of food increases as it spoils, the researchers tried to use a piece of the film as a color-changing label attached to a packet of raw chicken. The label started off orange but turned yellow and got 17% lighter after 20 hours at 30℃, indicating that the meat had begun to spoil. 

The researchers also loaded the COF layer with an antimicrobial (杀菌的) chemical. After 15 days, soya beans packaged in the film and left in high heat had about a third as much mould (霉菌) as beans wrapped in traditional plastic. 

To make a real impact, the material will need to be affordable and easy to produce. "The bar for competing with plastic products is very high," says Marelli.

It all started with a simple question: "Can I paint your portrait?"

In the summer of 2015, Brian Peterson and his wife, Vanessa, had just moved to Santa Ana, California. Outside the couple's fourth-floor apartment, a messy homeless man was often shouting on the street corner, sometimes keeping them awake at night. Peterson, 28, would pass the guy on his way to his job as a car designer at Kia Motors. but they never spoke. 

One day, Peterson was relaxing in his living room, reading the book Love Does, about the power of love in action, when his quiet was disturbed by the homeless man. Inspired by the book's sympathetic message. Peterson made an unexpected decision: He was going to go outside and introduce himself. 

In that first conversation, Peterson learned that the man's name was Matt Faris. He'd moved to Southern California from Kentucky to pursue a career in music, but he soon fell on hard times and ended up living on the street for more than a decade. 

"It was the weirdest thing to me," Peterson recalled later on the podcast (播客) Top Artist. "I saw beauty on the face of a man who hadn't shaved in probably a year, had overgrown fingernails, and probably hadn't had a shower in close to a year. But his story, the life inside of him, inspired me." And even though Peterson, a graduate of the Cleveland Institute of Art, hadn't picked up a paintbrush in about eight years, be found himself asking if he could paint Faris's portrait. Faris said yes.

Peterson's connection with Faris led to the creation of Faces of Santa Ana, a nonprofit organization that befriends and paints portraits of unhoused community members. Using a black-and-white photo taken with his phone, Peterson selects colors based on the subject's personality and story, resulting in powerful portraits. He sells the large paintings, signed by both the subject and artist, for a few thousand dollars. Half of the profits go into a "love account" for the models. helping them start again. Faris used his portrait funds to fulfill his musical dreams by recording an album. 

Mu Sa, a live stream host of the Hui ethnic group from Zhongning, Ningxia Hui autonomous region, is atypical example of how the Internet has turned many young unemployed people into useful talents contributing to society. 

After graduating from the Lanzhou-based Northwest Minzu University majoring in sociology, Mu worked as an office clerk in Shanghai, a marketing assistant in Beijing and a data analyst in Hangzhou. After struggling to realize his dream in big cities, Mu at last found that what touched him most was the "feathery tenderness" of homesickness.

Mu returned home at 25 after losing his job during the COVID-19 pandemic in November 2021. Depressed, Mu thought of himself a "failure" at first. However, he was not discouraged and quickly lifted himself up. Mu decided to pick up his cell phone and begin creating short videos about local people's daily lives at home and uploading them online.

A video clip showing his mother cooking local food turned out to be a surprise hit. So many viewers commented that the video brought back memories of their own moms and hometowns. Even Mu's mother was shocked that a daily routine should arouse so many people's interests. 

Mu said it was the success of this video clip that inspired him to carry on. He gradually found that village-related content was popular among his followers. "The more local the content, the more universal its appeal is." he said.

Since then, his father, mother, elder sister, classmates, friends and neighbors, their small courtyards, chickens, sheep, and vast fields have all become the subjects of Mu's camera lens. Many fans know about his hometown Dazhanchang and the lives of local residents in Northwest China through Mu's work. 

Xi'an, as the longest-running capital in ancient China, has shaped the country's culture and history. With a history of over 3, 000 years, it has given birth to many dynasties. If planning a short tour, be sure to visit the recommended attractions that truly capture the spirit of this ancient city. 

The Terracotta Army

The Terracotta Army is a remarkable archaeological find and a popular tourist destinationin China. Constructed by Emperor Qinshihuang in the 3rd century BC, it features life-size terracotta soldiers, horses, and chariots arranged in battle formation. The museum houses three vaults (墓穴) and an exhibition hall, with Vault One being the largest, displaying over 6, 000 figures. These sculptures offer insights of high value into ancient China's history, military, and culture. 

Ancient City Wall

Xi'an City Wall was built in the 14th century by Zhu Yuanzhang, the first Emperor of the Ming dynasty (1368-1644) as a military defense system. Now it is one of the oldest and best-preserved Chinese city walls. The wall is now a landmark, dividing the city into inner and outer areas. When you take a stroll or cycle on the massive wall, you can enjoy a good view of the city, the moat (护城河) and the watchtowers. 

Giant WildGoose Pagoda

The Giant Wild Goose Pagoda in China was built during the Tang Dynasty as a study place for Buddhist texts. It stored sutras (佛经) and sculptures brought from India by monk Xuan Zang, who translated scriptures here for 19 years. Situated in Da Ci'en Temple, the pagoda's impressive brick structure reflects traditional Chinese architecture, creating a solemn and magnificent atmosphere. 

Shaanxi History Museum

The Shaanxi History Museum displays 370, 000 relics found in Shaanxi, China, including bronze wares (青铜器) , pottery figures, gold and silverwares, and Tang Dynasty murals. 18 pieces are national treasures. Xi'an, the former capital, has many historical sites. The museum is divided into three sections, exhibiting artifacts from primitive eras to the late Qing Dynasty. 

I had always enjoyed living in my flat on the top floor of a Victorian building in Wimbledon. Being so high up made me feel safe and secure, and I enjoyed wonderful views across the tree tops. I had never expected that I would experience a fire in the flat.

One night I went to sleep as usual after setting my alarm clock for 7 am and switching off the bedside light. A few hours later, I woke up puzzled. I could smell smoke and I could see that the bedroom was extremely dark. Then I realized the room was so dark because it was filled with smoke. I immediately left my bed and stood by the door. I was in panic. I was also convinced that I had somehow caused the fire without knowing it. I thought, "What will my neighbors think? I must get rid of the smoke before it gets into their flats."

I managed to make my way to the curtains and tried to draw them open. This simple everyday act proved quite beyond me. When I finally opened the window, I saw all my neighbors standing on the lawn below, tightly wrapped up in their dressing gowns against the December cold. Then I realized it wasn't me that had caused the fire. It was someone else.

Even though I had taken many fire awareness courses at work, I forgot everything I'd ever been taught at that time. My one instinct was to flee down the stairs.

"There's a fire! Stay by the window!" someone shouted below the building. And that man's words of warning stopped me and helped save my life. If I had opened my front door at the top of the stairwell to escape, the flames raging below would have been drawn upwards by the rush of oxygen and would have swept over me in an instant. I knew I should go to the kitchen and wait for help by the window there. I knew the firemen would save me using a ladder.

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。

So I went to the kitchen.

……

Finally,the firemen arrived.

注意：1.写作词数应为80左右; 2.请按如下格式在答题卡的相应位置作答。

Dear Jim,

……

Yours sincerely,

Li Hua

An exhibition of British Victoria-era art and craft opened at Guangdong Museum in Guangzhou, Guangdong province on Friday - the first of its kind in China.

Entitled Splendour, Art in the Age of Victoria, the exhibition includes oil paintings, water color paintings, sculptures, garments, (piece) of jewelry and ceramics categories.

More than 100 artworks come from Britain's National Museums Liverpool, are joined by collections from Guangdong Museum, Guangzhou Thirteen Hongs Museum and China National Silk Museum.

The Victoria era（1837-1901） (mark)the height of the British Industrial Revolution and gave birth to a boom of British culture and arts. Some items on show reflect the  (combine)of Western and Eastern elements amid the trade globalization.

"The exhibition explores fine and (decorate) arts from the peak period of British history, the reign of Queen Victoria. ...Our trade and relationship China is one that we value and one that is really important for us (continue) into the modern day," said Laura Pye, director of National Museums Liverpool in a video message at the exhibition launching ceremony on Thursday night.

During the Victorian era, blue-and-white porcelains were (eager) collected by influential British artists and fast became fashion) within a growing middle class. "From European objects to oriental porcelain, the exhibition collections also enrich history of cultural interactions between the East and West," said John , the British consulate general to Guangzhou.

The exhibition will run until Aug 20.

The impressive collection of literature in the Library Cave at the Mogao Caves in Dunhuang, Northwest China's Gansu province, 1  one of the most inclusive, advanced and open 2  of the ancient Chinese, says Dunhuang specialist Zhao Xiaoxing. 

   3  in the Hexi Corridor, the main line of the ancient Silk Road, the caves, a UNESCO World Heritage Site, have been promoting goods and cultural 4 between the East and the West for more than 1,600 years.

While the Dunhuang wall paintings have recorded the glories of the past 5  , the more than 60,000 items of literature6  in the Library Cave, or Cave 17, dating from the 4th to the 11th centuries, have kept the 7  original quality through the written word, according to Dunhuang Academy.

   The value of the 8  was thoroughly demonstrated during the launch of the Digital Library Cave, a gamelike program 9  enables users to virtually witness, and participate in, the10  and fall of the Library Cave on the website Digital Dunhuang or via the WeChat miniprogram, Cloud Museum of Dunhuang Caves.

The Library Cave 11  in the mid-9th century and later12  unopened for almost 1,000 years 13  being accidentally discovered by Taoist priest Wang Yuanlu in 1900.The majority of its cultural relics, consisting of Buddhist manuscripts, 14  and economic documents and other delicate and 15 items, are now kept in foreign museums. 

UK taxpayers will pay tens of millions of pounds towards the cost of the King's coronation. ,including fans of the royals,who feel the expense particularly upset.

,which has stood above 10% in March, down slightly from the month prior, but still far higher than in the United States and Europe.

. They were rising at their fastest rate in more than 45 years in March as high input and labor costs have hurt domestic producers, and as a weaker pound has made imports more expensive.

The strain has pushed record numbers of people toward the UK's legions of food banks providing free groceries as wages have failed to keep pace with inflation.

The Trussell Trust, which distributes groceries to about 1,200 food banks, said last week that its network had handed out nearly 3 million emergency food parcels in the year to the end of March. , and a 37% rise on the previous 12-month period.

"We are experiencing an unprecedented rise in the number of people coming to the food bank.." Brian Thomas, chief executive at South Tyneside Foodbank, located in England's northeast, said in a statement.

A.That's a record for a single year

B.Food price rises show no signs of pulling back

C.Inflation in the UK has rocketed over the past year

D.The increasingly higher prices are beyond people's expectations.

E.Food banks have finally removed those long-accumulated products.

F.But millions of people are struggling to make ends meet as prices rise

G.They are no longer able to balance a low income against rising living costs

Rates of anti-dining syndrome in newborns surged in recent years, but a newer approach to caring for newborn babies exposed to drugs during pregnancy gets them out of the hospital sooner and with less medication.Newborns in drug withdrawal may experience upset stomach, miserable crying and extreme discomfort. Researchers looked at the impacts of the ESC ( Eat, Sleep, Console care) approach on 1,300 infants at 26 US hospitals, and compared them with the current standard for caring for infants exposed to drugs.

ESC encourages involvement from parents, and prioritizes care that doesn't involve medication, breastfeeding,for example.The usual approach involves a nurse measuring a baby's withdrawal symptoms before providing treatment .

Compared to usual care, use of the ESC approach substantially decreased time until those infants were medically ready for discharge, without increasing specified harmful outcomes.

The infants assessed with the ESC method were discharged after eight days on average, compared with almost 15 days for the infants who were cared for by the standard approach.Additionally, infants in the ESC care group were 63% less likely to receive drug medication – 19.5% received medication compared with 52% in the group receiving usual care.

The current approach to usual care is a very comprehensive and nurse-led way of assessing the infant, whereas the ESC approach involves the mom in the way that you assess the infant, and allows the mom to try her best to comfort the infants and see if the infant is able to be consoled or is able to eat or is able to sleep.

"So, in that way, it's a little bit more functional, like looking at the abilities of the infants versus how severely the infant is affected.Assessment results determine whether a baby should receive medication to control withdrawal symptoms,''said Baker,the director of the NIH HEAL Initiative,which provides funds to researchers studying ways to relieve the country's drug health crisis.