Have you heard an old saying “The grass looks greeener on the other side of the fence”? It means other places often look better, more interesting than the place where you live. “Let's go to KFC for dinner and then watch some Japanese cartoons!” We all know it: more and more Chinese kids love American and Japanese food and movies. Some people worry that young Chinese are beginning to feel that way. They see young Chinese ignoring (忽视) Chinese culture and, instead, buying Japanese cartoon books, watching Korean soap operas and even celebrating Western holidays.

    Foreign books and soap operas are good, but Chinese writers and actors are just as good. As for holidays, Christmas is nice, but it can never have the meaning for Chinese that Spring Festival has, and the West has nothing to compare with the Mid-Autumn Festival. China has lots of cool things in its culture: calligraphy, Bejing Opera, quick meals on the streets, and even Jay Chou! And let's not forget the part of Chinese culture I like best: its friendliness. Not all countries are as warm as China.

    It's good to enjoy other cultures and learn from them, but they can never replace your own culture. It's good to look on the other side of the fence, but make sure you take a good long book. You will find that the grass isn't always greener.

    Although some people become worried about that, I don't think they should. Will we get more powerful without learning from other countries? Will Chinese people live more happily without American fast food? Besides, it's fun to learn about different cultures. Chinese kids can learn about other cultures and have fun, but they also need to learn more about their own culture. Be proud of Chinese culture and of being Chinese!

    The human brain contains 10 thousand million cells and each of these may have a thousand connections. Such enormous numbers used to discourage us and cause us to dismiss the possibility of making a machine with human-like ability, but now that we have grown used to moving forward at such a pace we can be less sure. Quite soon, in only 10 or 20 years perhaps, we will be able to assemble a machine as complex as the human brain, and if we can we will. It may then take us a long time to render it intelligent by loading in the right software (软件)or by altering the architecture but that too will happen.

    I think it certain that in decades, not centuries, machines of silicon (硅) will arise first to compete and then do better than their human ancestors. Once they do better than us they will be capable of their own design. In a real sense they will be able to reproduce themselves. Silicon will have ended carbon's long control. And we will no longer be able to claim ourselves to be the finest intelligence in the known universe.

    As the intelligence of robots increases to match that of humans and as their cost declines through economies of scale we may use them to improve environments. Thus, deserts may bloom and the ocean beds be mined. Further ahead, by a combination of the great wealth this new age will bring and the technology it will provide, the construction of a vast, man-created world in space, home to thousands or millions of people, will be within our power.

    Money is the root of all evil (邪恶) and new study claims there may be some truth behind the saying. Scientists at the University of California Berkeley, US, announced on February 27 that rich people are more likely to do immoral things, such as lie or cheat, than poorer people. The scientists did a series of eight experiments. They published their findings online in the Proceedings of the National Academy of Sciences (PNA《美国国家科学院院刊》).

    They carried out the first two experiments from the sidewalk near Berkeley. They noted that drivers of newer and more expensive cars were more likely to cut off other cars and pedestrians at crosswalks. Nearly 45 percent of people driving expensive ears ignored a pedestrian compared with only 30 percent of people driving mow modest cars.

    In another experiment, a group of college students was asked if they would do immoral things in various everyday situations. Examples included taking printer paper from work and not telling a salesperson when he or she gave back more change. Students from higher — class families were more likely to act dishonestly.

    According to the scientists, rich people often think money can get them out of trouble. This makes them less afraid to take risks. It also means they care less about other people's feelings.

    Finally, it just makes them greedier. “Higher wealth status seems to make you want even more, and that increased want leads you to bend the rules or break the rules to serve your self- interest,” said Paul Piff, lead scientist of the study.

    Piff pointed out that the findings don't mean that all rich people are untrustworthy or all poor people honest. He said the experiments were to show how people living in different social situations express their instincts（本能）and values in different ways.

    GROUP EVENTS & PARTIES

    Wanting to have a great time for a special occasion (场合), but are tired of the usual restaurant dinner, or house party? If so, then bring your group to Florida Surf Lessons to go surfing and then get ready for a great time on the beach, and in the surf!

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    Birthday Parties: Surfing birthday parties are a fantastic way to celebrate life by getting out there and experiencing it. Guests at a surfing party will be grateful for this opportunity to join you in beginning this new and exciting challenge in life. We provide goodie bags (礼品包) and all. Parents: Not only will your child appreciate you but your celebrity status (名人地位) with their friends will soar!

    Teams & Clubs: Mix up the daily routine by taking your team or club surfing with Florida Surf Lessons. Your group is sure to have a wonderful experience.

School Field Trips: Attention teachers! Give your kids a field trip that is educational, fun and sure to please.

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    Sweet potato plants don't have spines or poisons to defend themselves. But some have evolved a clever way to let hungry herbivores (食草动物) know they aren't an all-you-can-eat buffet, a new study finds. When one leaf injured, it produces a chemical that warms the rest of the plant and its neighbors to make themselves inedible (不宜食用的)to bugs. Sweet potato breeders could potentially engineer plants to produce the chemical as an all-natural pest defense.

    Plant ecologists led by Axel Mithofer of the Max Planck Institute for Chemical Ecology in Jena, Germany, started to look into sweet potato (Ipomoea batatas) defenses after they noticed something interesting about two varieties of the plant grown in Taiwan: The yellow-skinned, yellow-fleshed Tainong 57 is generally herbivore-resistant, but its darker orange cousin, Tainong 66, is plagued (造成麻烦) by insect pests.

    To find out why, the team offered up Tainong 57 and 66 plants to hungry African cotton leafworm caterpillars (毛虫).Both plants released at least 40 airborne compounds as the caterpillars snacked on their leaves. But Tainong 57 produced a lot more of a chemical called DMNT, which has a very distinct smell, the team details this month in Scientific Reports. ("The smell is not nice," Mithofer says. "You wouldn't want it as a perfume.")

    DMNT isn't a new compound; researchers have isolated (分离出) the smelly chemical from other plants such as corn and cabbage, and it is known to induce defense responses in some species.

    To determine whether this was happening in sweet potatoes, scientists set up two experiments. First, they put two plants next to each other and wounded one so it produced DMNT. Then, they exposed healthy Tainong 57 plants to DMNT they had synthesized (合成).In both cases, the DMNT caused the exposed plants to produce more of a protein called sporamin in their leaves. (Tainong 66 did not have the same reaction.) When the caterpillar's snack on sporamin, "they immediately stop eating because they don't feel well," Mithofer says.

    Sporamin is the main protein in sweet potato tubers (块茎),and is indigestible raw, which is why sweet potatoes must be cooked for humans to enjoy them. "If the caterpillars could cook it, they could eat it," Mithofer says. Theoretically, he says, sweet potato breeders could use genetic engineering to make different varieties of sweet potato produce as much DMNT as Tainong 57, and display the same defense responses.

    Still, the research isn't ready for prime time, cautions plant ecologist Martin Heil. DMNT might work in the lab, but in the field, airborne chemicals can be "blown away in seconds," says Heil, who studies plant-insect interactions at the National Polytechnic Institute in Irapuato, Mexico.

    Mithofer himself has no plans now to create genetically engineered sweet potato plants, because they would not be a viable (能活下去的) crop in Europe, where genetically modified crops are outlawed. So for now, Tainong 66 will have to put up with being a caterpillar salad bar.

When it comes to travel, sometimes wandering is one of the most exciting things you can do. In a time when travellers are both more adventurous and eco-conscious than ever, it's no surprise that there's a wealth of new vocabulary to describe how we travel, when we travel and how the experience makes us feel. Here are eight of our favourite travel words that you may not have heard before.

We've kicked off a blog with the staycation, "a holiday in one's own country". The term first became popular in the mid-2000s, when the global financial crisis meant people had less income to spend on flash holidays and instead searched for cheaper local choices. Since 2020, the staycation is experiencing a revival (复兴). Benefits of staycations include cheaper travel costs, no spending hours in the airport and, of course, no need to worry about whether your passport expired (过期) last year.

Once upon a time, if you wanted to meet new people on your travels, you could stay at a hostel or with a host on Airbnb. Now, you can couch surf. And not just in "the staying at various friends' houses until you find a new place to rent" sense: couch surfing is quickly becoming a hot new travel trend. Travellers can now choose to couch surf all across the world via a website which treats travel as a cultural exchange, allowing people to connect with willing hosts and crash on their sofas.

Given that single-use and climate strike were selected as the Collins 2018 and 2019 Words of the Year respectively, it's clear that the climate crisis is very much on everybody's mind. This desire to make more sustainable choices is also affecting the way we spend our vacation days. Ecotourism is another popular travel trend, defined as tourism that is designed to contribute to the protection of the environment. Examples of ecotourism include ditching short-haul flights, staying at eco-friendly resorts, or booking a staycation.