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　　You are probably familiar with the saying：An apple a day keeps the doctor away．A recent research carried out by the Chinese University of Hong Kong may change the saying：

　　An apple a day may keep aging away．

　　The research chose fruit flies(果蝇), as they share many genes(基因)with humans．The fruit flies were either fed normally or had an apple extract(浓缩物)added to their diet．

　　It turned out that those fruit flies that were given apple extract lived about 55 days－five days longer than the flies that were normally fed．The research group also found it easier for the flies to walk，climb and move about as they aged．

　　According to the result, the researchers believed that the antioxidants(抗氧化剂)in the apple extract helped clean up dangerous chemicals(化学物质)that cause illnesses，as well as aging．

　　In another study，researchers examined diets of thousands of women．They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke．

　　The apples' genetic code(遗传密码)was discovered recently．It allows scientists to develop nicer and healthier fruits．Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer．

　　Apples that kill the desire(欲望)to eat could also be produced, with the first“extra-healthy''apples on supermarket shelves within just four or five years．

　　The team that keeps studying apple DNA includes 100 scientists from five countries．Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today's apple tree, experienced a great genetic change．The number of many of its genes doubled．The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits．

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阅读理解

　　You are probably familiar with the saying：An apple a day keeps the doctor away．A recent research carried out by the Chinese University of Hong Kong may change the saying：

　　An apple a day may keep aging away．

　　The research chose fruit flies(果蝇), as they share many genes(基因)with humans．The fruit flies were either fed normally or had an apple extract(浓缩物) added to their diet．

　　It turned out that those fruit flies that were given apple extract lived about 55 days－five days longer than the flies that were normally fed．The research group also found it easier for the flies to walk，climb and move about as they aged．

　　According to the result, the researchers believed that the antioxidants(抗氧化剂) in the apple extract helped clean up dangerous chemicals(化学物质) that cause illnesses，as well as aging．

　　In another study，researchers examined diets of thousands of women．They discovered that those who regularly ate apples were 20 percent less likely to suffer heart illnesses and stroke．

　　The apples' genetic code(遗传密码) was discovered recently．It allows scientists to develop nicer and healthier fruits．Researchers are already using the information to grow a kind of apples full of antioxidants that can keep eyes and joints healthy and protect humans against heart illnesses and cancer．

　　Apples that kill the desire(欲望) to eat could also be produced, with the first“extra-healthy''apples on supermarket shelves within just four or five years．

　　The team that keeps studying apple DNA includes 100 scientists from five countries．Their research also suggests that around 65 million years ago, when dinosaurs began to die off the plant，which would finally become today's apple tree, experienced a great genetic change．The number of many of its genes doubled．The extra genes allowed the apple to get used to worse conditions and go through a different development from peaches，strawberries and other related fruits．

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　　14-year-old Jason Morgan talks about an exciting science project．

　　Last month I got the chance to take part in an underwater research project in an area of the Gulf of Mexico called the Flower Gardens．A team of professional researchers ’ led by the scientist Dr Matt Phillips, was trying to learn more about the fish and different creatures that live in this part of the sea．The Flower Gardens are a long way from the shore(海岸)and we spent three days on a boat．

　　The team used a piece of underwater equipment called ROV to collect information．The ROV was great fun．It was controlled by a computer on the boat, and I was allowed to operate it a few times．

　　However, the thing I enjoyed most was diving(潜水)into the water．At first, I was quite scared－mainly because I couldn’ t see land in any direction．But as soon as I jumped into the water, I wasn't afraid anymore．It was amazing to see the colorful fish swimming around and I could see all the ways to the Flower Gardens, which are almost 30 metres down．

　　I will never forget the Flower Gardens．The trip was like a holiday but I also learnt new things about science and research projects．It was a great opportunity and it has made me think about my goals(目标)in life．The experience will help me work harder to become a scientist．

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　　"Spending as little as ＄5 a day on someone else can make you happier," the researchers from a team at the University(大学)of British Columbia and Harvard Business School reported．

　　Their experiments on 600 volunteers in the US showed people were feeling happier when they spent money on others．

　　The team asked their 600 volunteers about their income(收入)，their daily costs, gifts for others and donations to charity．"No matter how much money each person made, those who spent money on others could get greater happiness than those who spent money only on themselves," Dunn said．

　　Dunn's team also surveyed 16 workers at a company in Boston after they received an award of between ＄3,000 and ＄8,000．"Of course they felt happy after receiving the awards," they wrote in their report．"But when they gave the people in need ＄5, they were happier．"

　　"The findings showed that as little as ＄5 could be enough to produce happiness on a whole day," Dunn said．

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