Glastonbury Festival, one of the pioneer festivals, is famous not only for its amazing bands, but also for its wonderful performances in many fields surrounding (围绕) the stages. It attracts over 130,000 people every year, who join in the three-day party to celebrate the summer solstice, the longest day of the year.

    Glastonbury Festival has been held on Worthy Farm in Somerset since 1970. This year, all sorts of singers and bands were there, from the likes of Beyoncé, Jessie J, to my favorite — Paolo Nutini, who I really wish I could have met!

    We drove straight in to one of the muddiest (泥泞的) Glastonbury Festivals ever! We came to our camp site, carrying enough clothes for a weekend of extreme weather conditions, and spent an hour or so putting up the tent. On the second day it began to rain and didn't stop for the rest of the day. We sat in the tent waiting for it to stop, and after several hours we realized that it wouldn't. When the need for food became too strong we put on boots and raincoats and made our way across many muddy fields.

    There is something for everyone at the festival — my favourite place is the Circus Field, which is full of interactive (互动的) performances. Also, I love the Kidz Field, where famous CBBC stars perform, and where you can get your face painted then run around on a climbing frame (框架) with dragons.

    Most people would say the sea is blue and green. But the people who live near the coast of Zhejiang may say it is red. It is not people who caused the colour change, but very small living thing in the sea. They are algae(藻类)and protozoa(原生动物). They come in many different colours; red, yellow or brown. Red is the easiest of those to see so when this happens people call it a “red tide.”

    Red tides only happen when conditions in the sea are right. In the past few years, factories and people have been putting more chemicals into the sea. These chemicals help algae and protozoa to grow very quickly. The temperature of the sea is also important. Red tides usually happen at 20 to 30 degrees Celsius. Red tides often happen in dry, warm areas where there is little wind. Living things grow easily in these places. Sometimes fishermen help red tides by mistake. They put small sea animals into the water for food to help fish grow.

    Those living things do more than change the colour of the water-they also put poison and mucus(黏液)into the sea. This is had for fish. The poison is bad for their brains. And too much mucus in the sea fills up fish's gills(鳃) so they can't breathe. Lots of dead fish and other sea animals are now washed up on Chinese beaches.

    Red tides can be bad for people too. We shouldn't eat fish from red-tide waters. The algae gets inside of fish and it smells bad. It can make your eyes water. If people eat fish with too much algae inside they could die.

    Fishermen in Zhejiang are having a hard time right now. Because of the red tide, they are selling 30% less fresh seafood than usual.

    In China red tides usually happen in May and June around places like Fujian Guangdong and Hong Kong.

    Many other countries sometimes also have red tides. But it seems that we have few ways to stop red tides. They can last as long as 16 months.

Plastic-Eating Worms

    Humans produce more than 300 million tons of plastic every year. Almost half of that winds up in landfills(垃圾填埋场)，and up to 12 million tons pollute the oceans. So far there is no effective way to get rid of it, but a new study suggests an answer may lie in the stomachs of some hungry worms.

    Researchers in Spain and England recently found that the worms of the greater wax moth can break down polyethylene, which accounts for 40% of plastics. The team left 100 wax worms on a commercial polyethylene shopping bag for 12 hours, and the worms consumed and broke down about 92 milligrams, or almost 3% of it. To confirm that the worms' chewing alone was not responsible for the polyethylene breakdown, the researchers made some worms into paste(糊状物) and applied it to plastic films. 14 hours later the films had lost 13% of their mass--apparently broken down by enzymes(酶)from the worms' stomachs. Their findings were published in Current Biology in 2017.

    Federica Bertocchini, co-author of the study, says the worms' ability to break down their everyday food-beeswax--also allows them to break down plastic "Wax is a complex mixture, but the basic bond in polyethylene, the carbon-carbon bond, is there as well, "she explains. "The wax worm evolved a method or system to break this bond. "

    Jennifer Debruyn, a microbiologist at the University of Tennessee, who was not involved in the study, says it is not surprising that such worms can break down polyethylene. But compared with previous studies, she finds the speed of breaking down in this one exciting. The next step, DeBruyn says, will be to identify the cause of the breakdown. Is it an enzyme produced by the worm itself or by its gut microbes(肠道微生物)?

    Bertocchini agrees and hopes her team's findings might one day help employ the enzyme to break down plastics in landfills. But she expects using the chemical in some kind of industrial process-not simply "millions of worms thrown on top of the plastic."

    There's a new frontier in 3D printing that's beginning to come into focus: food. Recent development has made possible machines that print, cook, and serve foods on a mass scale. And the industry isn't stopping there.

    Food production

    With a 3D printer, a cook can print complicated chocolate sculptures and beautiful pieces for decoration on a wedding cake. Not everybody can do that — it takes years of experience, but a printer makes it easy. A restaurant in Spain uses a Foodini to "re-create forms and pieces" of food that are "exactly the same," freeing cooks to complete other tasks. In another restaurant, all of the dishes and desserts it serves are 3D-printed, rather than farm to table.

    Sustainability(可持续性)

    The global population is expected to grow to 9.6 billion by 2050, and some analysts estimate that food production will need to be raised by 50 percent to maintain current levels. Sustainability is becoming a necessity. 3D food printing could probably contribute to the solution. Some experts believe printers could use hydrocolloids (水解胶体) from plentiful renewables like algae(藻类) and grass to replace the familiar ingredients(烹饪原料). 3D printing can reduce fuel use and emissions. Grocery stores of the future might stock "food" that lasts years on end, freeing up shelf space and reducing transportation and storage requirements.

    Nutrition

    Future 3D food printers could make processed food healthier. Hod Lipson, a professor at Columbia University, said, "Food printing could allow consumers to print food with customized nutritional content, like vitamins. So instead of eating a piece of yesterday's bread from the supermarket, you'd eat something baked just for you on demand."

    Challenges

    Despite recent advancements in 3D food printing, the industry has many challenges to overcome. Currently, most ingredients must be changed to a paste(糊状物) before a printer can use them, and the printing process is quite time-consuming, because ingredients interact with each other in very complex ways. On top of that, most of the 3D food printers now are restricted to dry ingredients, because meat and milk products may easily go bad. Some experts are skeptical about 3D food printers, believing they are better suited for fast food restaurants than homes and high-end restaurants.

While they are at home alone, many people imagine {#blank#}1{#/blank#} (have) the opportunity {#blank#}2{#/blank#} （sing) together, which {#blank#}3{#/blank#} (realize) by a virtual choir. Anyone can take part in {#blank#}4{#/blank#} from anywhere and does not need a studio. It {#blank#}5{#/blank#} (prove) to be a positive influence on the lives of many people. Award-winning composer and conductor Eric Whitacre came up {#blank#}6{#/blank#} the idea of the virtual choir, {#blank#}7{#/blank#} began studying music in 1988. {#blank#}8{#/blank#} (finish) university in 1995, he received a master's degree in {#blank#}9{#/blank#} (music)composition in 1997. In 2009, his first virtual choir received, {#blank#}10{#/blank#} (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".