Different countries have different eating habits.There is a saying “Eat good things for breakfast, eat a big meal for lunch, but eat less at dinner.” in China.Many Americans agree that one should start the day with a good breakfast, but their ideas about lunch and dinner are different.

    Most Americans only give themselves a short time for lunch because they have not so much long time to have a rest at noon. So they eat a small lunch. After work they will have more time to eat a big dinner. Also a quiet dinner at home with all the family talking about their day is a way to take a good rest after a long, hard day of work.

    Eating at restaurants is also different. In China, people like to talk and laugh while eating. Very often you can hear people talking and laughing loudly, and they just having a good time. In America it is not like this. They want a quiet place where they can eat a good meal far away from the noises of the outside world．If someone is talking too loudly, the manager of the restaurant will look at him or her angrily. If some people are talking too loudly, the manager of the restaurant may come out and ask them to be quiet.

    The American book Who Moved My Cheese has been a best seller all over the world. It teaches people how to face changes in their lives. It is just for teens. The book tells us that when facing change in our life, like a new school or new friends, don't be afraid. Use this change to make a better life.

    The book gives an example of a change at school. A school is changing from having two terms to three terms because there are too many students. Several teens are talking about this. Most of them are unhappy and worried. But Chris is not. He laughs and tells a story about two mice, two“little people”and some cheese.

    The four are in a maze(迷宫)looking for  The cheese. Here, cheese means some thing important in life. But they find the cheese is gone. The mice realize that they can't change what has happened and have to find more cheese. This means finding different dreams. The little people can't do this. They are afraid of change so they find no cheese.

    After Chris finishes the story, the friends understand one thing:to get more cheese, move in a new direction quickly. His friends understand how this can be used in the changes all teens face, such as doing well at school or feeling good about yourself.

It is known that there are different seasons in a year. But do you know the seasons in China? China is a large 1 and different parts have different features (特征). There are many 2 between the north and the south.

In 3 , it is quite cold in the north of China. The temperature is often 4 and the water freezes (结冰) in the river. Sometimes it snows 5 and everything is white after the snow. People often wear 6 coats and shoes to do outdoor activities, such as making 7 , throwing snow balls and going skating. But in most southern cities, the 8 is usually not that cold but much wetter in winter. People in Hainan can even go swimming in the sea and enjoy the bright sunshine on the beach.

People's way of 9 in the north is quite different from that in the south. In the north, people like eating food like buns and noodles, while rice is the main 10 for people in the south. People in the north usually come and go by land, but people in the south travel by land and by boat.

In general, if you decide to visit China, spring is the best time for the trip. Temperatures in most areas are warming up, but not yet so hot.

Circles can be found everywhere in the natural world, but with no exact way to measure (测量) thc. They are very mysterious (神秘的) and might never be completely understood. When you take the distance around a circle and divide it by the distance across a circle, you will always get Pi. While Pi is about 3. 14 when round ed, it is endlessly long. With the help of computers, mathematicians (数学家) have been able to work Pi out to over a trillion decimal places (小数点后万亿位). This makes Pi mysterious, even to the most famous mathematicians.

Pi Day is celebrated on March 14, since the way we write this date, 3/14, looks just like Pi when rounded. In 2009, U.S. Congress voted to formally make March 14 Pi Day. Certain parts of the world — places where March 14 is written as 14/3 — will instead celebrate Pi Approximation Day which takes place on July 22nd because of the division (除法) result of 22/7.

Pi has appeared in movies, comics, music, and more. "In modern movies, any time the filmmaker wants to create a sense of mystery, the  symbol Pi is used," says Blatner. People also love working to remember the digits ( 数 位 ) of Pi and competing against  others to  see who can remember most. The Guinness World Record for remembering the most digits  of Pi is  held by  Lu  Chao  of China, who successfully remembered Pi to nearly 67,000 decimal places.

Above all, Pi Day is about having fun with the number, according to Blatner. People will celebrate Pi Day by eating pie and throwing pie, and with fun Pi-related games. Princeton, New Jersey holds a series of Pi-related festivities. Events this year include a surprise birthday party for Albert Einstein whose birthday also falls on March 14, and a "Walk a Pi Event" where participants will walk 3. 14 miles together. Just like the number itself, the possibilities for Pi Day are truly endless.