Harvard researchers have created a tough, low-cost, biodegradable (可生物降解的) material inspired by insects' hard outer shells. The material's inventors say it has a number of possible uses and someday could provide a more environmentally friendly alternative to plastic. The material, made from shrimp ('虾) shells and proteins produced from silk, is called "shrilk." It is thin, clear, flexible and strong.

    A major benefit of the material is its biodegradability. Plastic's toughness and flexibility represented a revolution in materials science during the 1950s and '60s. Decades later, however, plastic's very durability (耐用性) is raising questions about how appropriate it is for one-time products such as plastic bags, or short-lived consumer goods, used in the home for a few years and then cast into a landfill where they will degrade for centuries. What is the point of making something that lasts 1,000 years?

    Shrilk not only will degrade in a landfill, but its basic components are used as fertilizer(肥料), and so will enrich the soil.

    Shrilk has great potential, the inventors said. Materials from which it is made are plentiful in nature, found in everything ranging from shrimp shells, insect bodies to living plants. That makes shrilk low cost, and its mass production possible should it be used for products demanding a lot of material.

Work on shrilk is continuing in the lab. The inventors said the material becomes flexible when wet, so they're exploring ways to use it in wet environments. They're also developing simpler production processes, which could be used for non-medical products, like for computer cases and other products inside the home. They're even exploring combining it with other materials, like carbon fibers, to give it new properties.

    It was a cold winter. The wind blew all night and the snow was blinding. When morning came, my three children and I got up and made our way to the windows. As we looked out the window, we saw that the henhouse was gone. Our three hens had been blown away.

    I looked at the emptiness outside. Then I saw all three chickens sat around the edge of a white bucket. How was this violent wind not blowing them into the field beyond? I quickly pulled on long snow pants and heavy winter coat, wrapped a scarf and stuck my feet into very large boots .

    I shouted at the wind as it blew. I was alone, save for my children. They stared out the window into the vast white sea of snow, their eyes peeled for any sign of movement. Outside I heard the sound of my boots as I walked against the wind.

    The snow circling around me, I steadily made my way to the soft cluck-cluck-cluck sound my hens always made. When I reached them, I saw that their little feet were holding on to the edge of the bucket, heads bent forward and away from the wind. I gently lifted each hen and put it carefully into the warm inside. Then I began the freezing walk back to the small shed directly behind our house. One by one I laid my chickens on the cold floor, and they began to cluck softly.

    As I shut the shed doors, my eyes went directly to the window where my children were watching. They jumped up and down cheering, and so did I! I wasn't some dragon slayer (屠龙者) from a fairy tale. I was simply a mom, but the look on my children's faces told me that they thought I was a hero mom.

    In China, Major Cold (大寒) is the last solar term in winter and also the last solar term in the annual lunar(阴历的) calendar. In this period, snow, rain and icy cold weather have a big influence on people's lives.

    Here are several things you should know about Major Cold.

    Eating "dispelling cold cake" (吃"消寒糕")

    During Major Cold, people in Beijing have a habit of eating "dispelling cold cake", a kind of rice cake. Sticky rice, the cake's main ingredient, contains more sugar than rice, which can make people feel warm all over their bodies. In Chinese the word "rice cake" has the same pronunciation with the word "higher in a new year", which symbolizes good luck and continual promotion.

    Eating fried spring roll（吃春卷）

    In Anqing of Anhui province, people traditionally eat fried spring rolls during Major

    Cold. They use a round, cooked, thin pancake to wrap stuffing（馅料）in a thin roll. Then it is fried in a pan with oil until it turns yellow and floats to the top. The stuffing inside the spring roll contains meat or vegetables and the flavor can be salty or sweet.

    Drinking stewed soup

    People in Nanjing of Jiangsu province like to drink stewed soup during Major Cold, which can make people feel warm from head to foot. They always stew the aged hen soup with ginseng(人参), matrimony vine(枸杞) and black fungus(黑木耳).

    Doing winter sports

    There is a saying that goes, "Dripping water freezes during Minor and Major Cold." In various regions of China, Major Cold is the perfect time for winter sports such as skiing, ice skating and sledding.

    Stefano Boeri, the Italian architect, famous for his Bosco Verticale, a group of tree-covered skyscrapers in Milan, introduced his new plans to pioneer a similar project in the Chinese city of Nanjing.

    The Chinese version of Boeri's Bosco Verticale, or vertical forest, will be his first project in Asia. The project will consist of two neighboring towers that will be coated with 23 different species of trees and more than 2,500 kinds of bushes hanging down the sides of the buildings. The structures will be built with the ability to house offices and will feature a 247-room luxury hotel, as well as a museum and even a green architecture school. The towers are currently under construction and are set for completion within the next year.

    But two buildings aren't enough for the ambitious Boeri as he now has even bolder plans for China to create “forest cities” in a country that has become known as an urban center choking on poisonous gases and dust.

    In an interview about his plans to “greenify” the city and country Boeri said, “We have been asked to design an entire city where you don't only have one tall building, but you have 100 or 200 buildings of different sizes, all with trees and plants on the sides.” Boeri continued, “We are working very seriously on designing all the different buildings. I think they will start to build at the end of this year. By 2020 we could imagine having the first forest city in China.”

    Although these towers will lend a huge hand in decreasing air pollution in China's eastern city, Boeri has said, it will take more than a pair of tree-covered skyscrapers to really solve China's pollution crisis. This is why the Italian architect hopes to repeat his design in other parts of the country, as well as in other places around the world.

    People from Britain and Ireland first came to live in Australia in 1788. They brought different dialects （方言）of English with them. These different kinds of English began to mix and change. The newcomers soon began to speak with their own typical accent（口音） and vocabulary. More and more people came to Australia during the Gold Rush in the 19th and 20th centuries. Some came from Britain and Ireland; others came from non-English speaking countries. Australian English continued to grow and change.

    Australian English has also been influenced by American English. During the Second World War, there were many American soldiers staying in Australia. More importantly, American television shows and music have been popular in Australia since the 1950s.

    Australians use many words that other English speakers do not use. The famous Australian greeting, for example, is G'day! A native forest is called the bush and central Australia is called the outback. Many words were brought to Australia from Britain and Ireland. For example, mate means "friend", and it is still used in Britain. Some of these words have changed in meaning. Some words have come from Australian original languages, many of which are names for animals, plants and places, like dingo and kangaroo.

    Australian spelling comes from British spelling. In words like organise and realise, -ise is the expected and taught spelling method. In words like colour, favourite, -our is the normal, but nouns such as the Labor Party and Victor Harbor are spelled with -or. Program, on the other hand, is more common than programme.

    There are also differences in the definition （定义）of words Australians use in different parts of the country. For example, football means "rugby" in New South Wales and Queensland, but "Australian rules football" in everywhere else in Australia. In New South Wales, a swimming costume is called a cossie or swimmers, while in Queensland it is called togs and bathers in Victoria.

    Hiking is a great way to get active and reduce stress while you are exploring the city. Visit our page to find some of the best free walking tours across New York City.

Community Days at Conference House Park

Wednesday, September 19, 2018 12:00p.m.—2:00p.m.

    Enjoy new gardens at the Visitor Center. Explore and help repair the three self-designed gardens: vegetable, native plant, and sculpture. Experience kids crafts，adult art programs, Tai Chi and more in this lovely setting.

    Position: Conference House Park, 298 Satterlee Street, Staten Island

    Event Organizer: Conference House Park

    Phone Number: (718)227-1463

    Contact Email: john.kilcullen@parks .nyc.qov

    Greenbelt on the Go

Tuesday, August 14, 2018 10:00a.m.—11:30a.m.

    Join us for relaxing walks through our parks. Enjoy the pretty views of them, as we point out a few of the distinct features that make each park special. The length of each hike will be determined by the pace of the group. Registration is required. To register, please email naturecenter@sigreenbelt.org before August 14.

    Position: Greenbelt Nature Center in Blood Root Valley, 700 Rockland Avenue at Brielle Avenue Staten Island

    Event Organizer: Staten Island Greenbelt Conservancy, Greenbelt Environmental Education Department

    Phone Number: (718)351-3450

    Contact Email: naturecenter@sigreenbelt.org

    Adult Afternoon Hikes

Wednesday, October 10, 2018 1:30p.m.—3:00p.m.

    Get familiar with the Greenbelt and local parks by hiking with other adults! You're encouraged to bring small meals and drinks for the break time.

    Position: Greenbelt Nature Center in Blood Root Valley, 700 Rockland Avenue at Brielle Avenue Staten Island

    Event Organizer: Staten Island Greenbelt Conservancy, Greenbelt Environmental Education Department

    Phone Number: (718)351-3450

    Contact Email: naturecenter@sigreenbelt.org

    The South Pole at Wards Point

Thursday, November 15, 2018 7:00a.m.—7:00p.m.

    The three miles of nearby natural shoreline are a sandy beach. Shells, rocks, and stones of every shape and size can be found here. Not to be missed are the park's other attractions: acres of woodland, four galleries, and five historic houses!

Position: Conference House Park Visitor Center in Conference House Park, 298 Satterlee Street, Staten Island

    Event Organizer: Conference House Park

Contact Email: john.kilcullen@parks.nyc.qov