This is my first speech in my life to discuss the issue of environmental protection with the experts and friends who are in the United States ! I was nervous during the rehearsal, fearing that an error in the process of speech. That day I got up very early .I came to the lecture room practice several times .Then I felt more confidence! In a speech later, so I don’t have the feeling of tension, completely relaxed to expound the content of the more freely expressed. I hope every one who sat in the audience to notice this problem and pay attention to protect our environment. Let our life more beautiful!