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.

    The coffee shop Starbucks will give people a discount if they bring their own cups. It wants to cut down on the number of paper cups that are put in the rubbish bins. It is part of a two month experiment in cafes in England. Starbucks wants to reduce waste and recycle more, The president of Starbucks in the UK said, "We are very happy to increase recycling rates(比率)，and reusable cups are a key part of our waste reduction plan." Bosses will decide later if they will continue the discounts. People who bring their own cups will not get a discount on the cafe's cheaper filter coffee.

    The problem of paper cups has been in the news a lot. Around seven million cups are thrown away every day. Reporters say that some cafes lie about how many paper cups they recycle. The reporters say the cafes do not recycle as many cups as they say. Customers wrongly believe that a coffee shop is environmentally friendly. Less than one in 400 paper cups at coffee shops are recycled. A coffee drinker said she would bring her own cup. She said, "I am so sad that cafes recycle so little. I thought they were more responsible."

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Too many people want others to be their friends, but they don't give friendship back. That is why some friendships don't last（持续）very long. To have a friend, you must learn to treat your friend the way you want your friend to treat(对待) you. Learning to be a good friend means learning three rules: be honest; be generous; be understanding. 

Honesty helps start a good friendship. Friends must be able to trust（信任）each other. If you don't tell the truth, people usually find out. If a friend finds out that you are not honest, you may lose your friend's trust. Good friends should always speak and act honestly. 

Generosity means sharing and sharing makes a friendship grow. You don't have to give your lunch money, your clothes, or your hobbies. Naturally you will want to share your ideas and feelings. They tell your friend what is important to you. By sharing them, you help your friend know you better. 

Sooner or later everyone needs understanding and help with a problem. Something may go wrong at school. Talking about the problem can make it easier to solve. Turning to a friend can be a first step in solving the problem. So to be a friend you must listen and understand. You must try to put yourself in your friend's place so you can understand the problem better. 

No two friendships are ever exactly alike. But all true friendships have three things in common. If you plan to keep your friendships, you must practice honesty, generosity and understanding. 

The Feyman Technique(费曼学习法) was developed by Nobel Prize-winning physicist(物理学家)Richard Feynman. It's a study method that helps students learn by teaching others. 

The Feyman Technique has been one of the most effective study methods for many years. For one thing, it helps students really understand something instead of just memorizing information. Plus, unlike traditional study methods like re-reading textbooks or reviewing notes, it pushes students to be more actively involved(参与) in the learning process. 

If you want to use the Feynman Technique to study better, follow these steps. To begin with, choose a topic you want to learn, including sub-topics(子主题). If not, you'll end up jumping between topics without developing a deeper understanding of any of them. 

The second step is the heart of the Feynman Technique: explaining the topic simply enough to be understood by a sixth-grade student. This requires you to help the child understand by using the simplest and clearest language. This step helps divide indigestible topics into their most basic parts. 

Next, review your explanation and try to find any area where you felt that you couldn't explain the topic simply. When possible, it can be very helpful to get advice from someone whose understanding is similar to that of a sixth-grader. 

The fourth step is to improve your explanation using the information collected from the third step. Finally, repeat the steps. The Feynman Technique works best with repetition, and that is why going through all the prior(先前的)steps just once is usually not enough to fully understand the topic. 

Once you're confident you've learned the topic, it's time to give yourself-a prize. Perhaps, like me, enjoy a nice cup of coffee.