The leaders （领导人） of 13 countries had a big meeting in St Petersburg, Russia from November 21 to 24, 2010.The meeting was about tigers. They talked about the ways to protect the animals in their countries. They agreed to spend more money protecting tigers and they wanted to double the number of tigers in the world before 2022.

    Tiger is one of the world's most endangered animals. The World Wildlife Fund （WWF） says, there are only about 100,000 wild tigers now. And the number is becoming smaller and smaller. 'If nothing happens, tigers will face disasters,' said WWF spokeswoman Marie von Zeipel.

Nine types of tigers lived 100 years ago, but now at least three of them have died out. ‘If people leave tigers alone and don't kill them, then the number of tigers will double in 10 years,' said Jean-Christoph Vie, a French tiger expert (专家).

    China is one of the 13 countries where tigers live. There are about 50 wild tigers in China now. They are the Bengal tigers in Tibet, Indochinese tigers in China's southwest, and Siberian tigers in the northeast. The South China tigers lived in southeast China many years ago but disappeared in the 1970s. Many experts think they have already died out.

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    Animals grow up in different ways. Some newborn animals are helpless but their mothers protect them. A newborn kangaroo is very small. It is only a few centimeters(cm) long. It closes its eyes and doesn't have hair. It stays safe in its mother' s pouch(育儿袋) for a long time.A newborn monkey can not walk. Its mother carries it everywhere.

Other baby animals can walk soon after they're born. They learn to run with their mothers when danger is near. A baby zebra can run, an hour after it is born.

    Some baby animals are born in a place that is safe. Baby wolves are usually born in big holes with little light. Other baby animals are born in the open. A baby elephant is often born on open land.

    Animals that drink their mothers' milk are called mammals. A mother bear's milk is rich. Baby bears have milk for a few months. This is the same with baby zebras. As baby animals grow, they need solid(固体) food. Baby lions eat what their mother can catch!

    According to a national study, in the summer of 2013, the long-term(长期的) warm weather in the UK has made the number of butterflies increase.

    Around 46,000 volunteers(志愿者) took part in the year's Big Butterfly Count(统计), and they found 830,000 butterflies.Volunteers were asked to make a record.They would record how many times they found one of 21 different kinds of butterflies.

    Later, the scientists used the records to find out how many butterflies of different kinds were found across the country.Then, they compared the results to the year before.They found that there was a rise in the number of 15 kinds of butterflies, and some of them went up by 50% compared to recent years.They said the increase in butterfly numbers was a result of warm weather.

    However, scientists also said that the number of butterflies was in decline(下降) as a whole, and that we might not see the same result the next year.

    Richard Fox, who works for Butterfly Conservation, said, “UK butterflies are in long-term decline.Studies have been done since the 1970s.They show that UK butterflies have declined in type and number.”

    He added, “We must halt the long-term decline of these beautiful creatures(生物).The only way is by stopping the damage that has been done to the butterflies' habitats(栖息地) across the UK.”

    Some people seem to have unusual memories. Zheng Aiqiang, a "memory athlete" on TV show Super Brain, can remember 2,660 numbers in just one hour!

    You would think people like him must have special brains. But according to a recent study by researchers from America and Holland, the brain structure (结构) of ordinary people and 23 of the world's leading memory athletes shows no difference.

    Good memories can be trained. New research in the magazine Neuron suggests that a person will get a super memory with just six weeks of hard training.

    Researchers found that a technique (技巧) called loci, invented by the ancient Greeks, can greatly help improve memory.

    By using loci, you are using your imagination to improve the brain's memory networks. You can link (关联) something you need to remember with a place that you know very well. For example, to remember a list of numbers, imagine yourself walking through your house. Each thing is linked to a number. For example, zero could be the handle on the door and five could be the painting on the wall.

    In one study, some ordinary people were given 20 minutes to remember 72 nouns. At the beginning, they could only remember 26 words, but when they were taught loci, they could remember 62 words.

"Not everyone can become a memory winner. But everyone using the technique can improve his memory greatly," said Boris Konrad, one of the researchers in the study.

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    Parents, especially those of teenagers, care about their children's education more than anything else. They would do    {#blank#}1{#/blank#} for their children. Many of them spend most of their spare time {#blank#}2{#/blank#} their children with their studies. If they have no time or cannot do it themselves, they would hire family teachers {#blank#}3{#/blank#} send their children to after-class schools. It seems as if a better education is all that parents expect for {#blank#}4{#/blank#}.

    How can we explain the present situation? First of all, many parents have {#blank#}5{#/blank#} that future success depends more and more {#blank#}6{#/blank#} skills and education. Secondly, in a competitive(竞争的) society there are both losers and {#blank#}7{#/blank#}. Those who have better skills and more knowledge will enjoy {#blank#}8{#/blank#} opportunities(机会).

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It's time for the new TV show Dian Ji Li De Zhong Guo.Are you ready? 

On the screen, Sa Beining, as a reader, goes into a "library" full of famous {#blank#}1{#/blank#} Chinese classic books. He takes a book, sits down {#blank#}2{#/blank#} opens it. Today he will read Ben Cao Gang Mu.

Don't take your eyes off the screen. Look! The people in the {#blank#}3{#/blank#} "come to life". A play about Li Shizhen who wrote the book begins {#blank#}4{#/blank#} another stage. In the play, Wang Jinsong, a famous actor, plays the role of Li Shizhen, who lived more than 400 years {#blank#}5{#/blank#}. You can see these scenes in the play: Li {#blank#}6{#/blank#} his father to allow him to study medicine. He went with his father to help sick people. And he {#blank#}7{#/blank#} nearly 30 years writing the book. It's a pity that he didn't see his book printed out. 

Then a big surprise appears in the "library". Sa Beining meets Li Shizhen. Sa puts the printed Ben Cao Gang Mu before Li. With tears in his eyes, Li says, "My dream finally came {#blank#}8{#/blank#} Sa and Li bow to each other. {#blank#}9{#/blank#} a moving moment!" 

Besides Ben Cao Gang Mu, Sa also reads Shang Shu, Shi Ji, Tian Gong Kai Wu,etc. In this new form, Dian Ji Li De Zhong Guo is amazing each time. Why not watch {#blank#}10{#/blank#}and have a talk with the great people through these ancient Chinese classic books?