As is reported, China owns the most cell phones in the word. The cellphone plays an important part in our daily life. By using it, we can contect people at any time and in any place. Besides, many functions are designed to meet different needs of people. For example, we can send short messages, and surf the Internet through the cellphone. But one coin has two sides. The radiation sent by it does great harm to peoples health. As a result of using the cellphone,people have fewer chances to commun
