Beijing's markets will soon be flooded with more and cheaper colorful fruit such as orange, mangos and green durian（榴莲）all year round.

    Thanks to a new free trade agreement signed last Monday between China and the Association of Southeast Asian Nations（ASEAN），more and more tropical Southeast Asian fruit will enter the country.

    The agreement means that from July 1,2005, China and ASEAN countries will begin to cut tariffs. There are about 7,000 products included in the cuts. As global communication develops, countries are trading more and more goods with each other. When products are sold across national borders, countries put a tax on them. This type of tax is called a tariff. Just like removing an obstacle from the path of these goods, the reduction of tariffs will encourage trade between China and ASEAN countries. It means more products and lower prices.

    The agreement will bring real benefits for Chinese customers, said a Chinese Foreign Ministry spokesman. “In the Beijing markets you will easily find more tropical fruit like durian, which used to very, very, very expensive. Now they will be cheaper.” The current tariff rate on durian is 22 per cent but will fall to zero in 2005.

    In the first 10 months of this year China did US＄84.6 billion of trade with ASEAN countries. Experts believe this may reach US＄100 billion next year. Founded in 1967, ASEAN now includes Indonesia, Malaysia, Singapore, the Philippines, Thailand, Brunei, Viet Nam, Myanmar, Cambodia and Laos.

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    Exercise may help to safeguard the mind against depression(沮丧) through previously unknown effects on working muscles, according to a new study involving mice.

    Mental health experts have long been aware that even mild, repeated stress can contribute to the development of depression and other mood disorders in animals and people. Scientists have also known that exercise seems to cushion against depression. But precisely how exercise, a physical activity can reduce someone's risk for depression, a mood state, has been mysterious. So for the new study, researchers at the Karolinska Institute in Stockholm studied the brains and behavior of mice in a complicated and novel fashion.

    We can't ask mice if they are feeling cheerful or in low spirits. Instead, researchers have pictured certain behaviors that indicate depression in mice. If animals lose weight, stop seeking out a sugar solution when it's available — because, probably, they no longer experience normal pleasures — or give up trying to escape from the cold-water zone just freeze in place, they are categorized as depressed. And in the new experiment, after five weeks of frequent but low-level stress, such as being lightly shocked, mice displayed exactly those behaviors. They became depressed.

    The scientists could then have tested whether exercise blunts (延缓) the risk of developing depression after stress by having mice run first. But, frankly, from earlier research, they wanted to know how, so they bred pre-exercised mice. A wealth of earlier research by these scientists and others had shown that aerobic exercise, in both mice and people, increases the production within muscles of an enzyme (酶) called PGC-1alpha. The Karolinska scientists suspected（怀疑） that this enzyme somehow creates conditions within the body that protect the brain against depression. Then, the scientists exposed the animals, which without exercising, were in high levels of PGC-1alpha to five weeks of mild stress. The mice responded with slight symptoms of worry. But they did not develop depression. They continued to seek out sugar and fought to get out of the cold-water zone. Their high levels of PGC-1alpha appeared to make them depression-resistant（抵抗的）. Finally, to ensure that these findings are relevant to people, the researchers had a group of adult volunteers complete three weeks of frequent endurance training, consisting of 40 to 50 minutes of moderate cycling or jogging. The scientists conducted muscle biopsies (活体检查) before and after the program and found that by the end of the three weeks, the volunteers' muscle cells contained substantially more PGC-1alpha than at the study's start.

    The finding of these results, in the simplest terms, is that “you reduce the risk of getting depression when you exercise,” said Maria Lindskog, a researcher at the Karolinska Institute.

Primary Source Holiday Shopping Night at Ten Thousand Villages

● Shop for your holiday gifts and give back to Primary Source at Ten Thousand Villages on Friday, December 4! 15% of all sales from 3:00 p. m．—7:00 p. m. that day will be donated to Primary Source. Join us for light refreshments and enjoy beautiful handmade gifts from artisans around the world. All are welcome!

Primary Source's Holiday Shopping Night

Friday, December 4, 2014

3:00 p. m．—7:00 p. m.

Ten Thousand Villages

226 Harvard Street, Brookline, Massachusetts (Coolidge Corner)

Download our flyer and tell your friends!

    Ten Thousand Villages provides vital, fair income for the people from developing countries by marketing their handicrafts and telling their stories in North America. Learn more and preview toys, home decor, jewelry, and other gifts online.

● Can't join us on Dec. 4? At GoodShop, 30% of your spending will be given to Primary Source. The next time you're ready to make an online purchase(购物), visit www. goodshop. com and enter “Primary Source” in the space provided. Click “verify” and choose from more than seven hundred popular stores and sites, from Apple to Zappos. GoodShop is free and easy to use, and each purchase you make will help Primary Source provide global education materials for schools all over New England.

    Two men were sitting together in a plane. They were on a long journey. One of the men was a businessman. The other was a farmer. They sat without talking for a while, then the farmer said, “Let's do something to pass the time.”

     “What do you want to do?” the businessman asked. “We can ask each other riddles.” The farmer said, “You start.” “Let's make the rules first,” the businessman said. “That's not fair. You are a businessman with much knowledge. You know more things than I do. I am just a farmer.”

    “That's true.” The businessman said. “What do you want we should do?” “If you don't know the answer to a riddle, you pay me $100. And if I don't know the answer, I'll pay you $50.” The farmer said. The businessman thought about this, then he said, “OK. That's fair. Who will go first?”

    “I will,” The farmer said. “Here is my riddle. What has three legs when it walks, but only two legs when it flies?” The business man repeated the riddle, “What has three legs when it walks, but only two legs when it flies? Mm, that's a good one. I'm afraid I don't know the answer.” He gave the farmer $100, then said, “Tell me the answer. What has three legs when it walks, but only two legs when it flies?” “I don't know.” The farmer said and gave him $50.

    If you get into the forest with your friends, stay with them always. If you don't, you may get lost. If you really get lost, this is what you should do. Sit down and stay where you are. Don't try to find your friends—let them find you by staying in one place.

    There is another way to help your friends or other nearby people to find you. Give them a signal (信号) by shouting or whistling (吹口哨) three times. Any signal given three times is a call for help.

    Keep up shouting or whistling always three times together. When people hear you, they will know that you are not just making noise for fun. They will let you know that they have heard your signal. They give you two shouts, two whistles, or two gun-shots (枪声). When someone gives you a signal, it is an answer to a call for help.

If you don't think that you will get help before night comes, try to make a little house—cover up to the holes with branches (树枝) with lots of leaves. Make yourself a soft bed with leaves and grass.

    What should you do if you get hungry or need drinking water? You would have to leave your little house to look for a river. Don't just walk away. Pick off small branches and drop them as you walk so that you can find your way back. The most important thing to do when you are lost is—stay in one place.

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