In many high schools，there are strict rules about using mobile phones. If your phone rings in class，for example，the teacher will be very angry.
   Every mobile phone has a ringtone (铃声). It tells you that someone is calling you. Now，there is a ringtone called “mosquitotone (蚊子铃声)”. Using it，students can receive calls and text messages (短信) in class but the teacher will not realize what is happening. How?
   Mosquitotone has a special sound. Only children and teenagers can hear it. As we get older，we are unable to hear some sounds with high frequencies (频率). As a result，a child or teenager can hear the mosquitotone ringtone, but it's_inaudible_to someone 20 or older.
   But sometimes，people over 20 can hear the ringtone. One British student's phone uses mosquitotone. In class，the student's phone rang. The 32­year­old teacher looked at the student and became unhappy. “I heard that. You know the rule：no mobile phone in class.”
   Not all the students are interested in mosquitotone. Jerry Jones，a high school student of 17，says，“Using mosquitotone too often is bad for our hearing. I may use it for pleasure，but not in class. It's unfair to the teachers！”
   What do parents think of mosquitotone？“I think it is perfect for places like movie theaters，” says Connie Neeson,44.“Think about it. Yon're watching a film and someone's mobile phone rings. Mosquitotone is good because many people don't hear it. However，it also has a bad influence on their study if students use it in class.”

    If you love reading books, you must know about the book The Little Prince. It's a famous novel written by a French writer. As one of the best-selling books in history, it has been sold as many as 200 million copies in 253 languages and dialects(方言). Now, around seventy years after the birth of the book, an American director has found a way to make it into a 3D animated film.

    The book tells the story of a pilot, called The Aviator, who crashes(撞击)into the desert and meets a young prince there. However, in the film, the story starts years after the crash when The Aviator is much older. He has got a new neighbor called The Little Girl, whose mother wants her to get ready to enter the grown-up world. Slowly, the Aviator shares his story with The Little Girl by writing it down and sending her a page at a time. The pages are complete with the pictures in the book, speaking about his time in the desert and taking The Little Girl to an amazing world where anything is possible.

    China is the first country in the world to see the film in two versions--in Chinese and English. The film shows The Little Girl's life and tells The Little Prince's story at the same time in a beautiful way.

    Huang Lei, who voices the film together with his 9-year-old daughter, says the film is like a childhood dream which is lost by most adults in this stressed-out society.

    “The most touching part is that every one of us was a good-natured kid like the Little Prince, and it's a pity that this good characteristic(品质)goes away as time flies,” he says.