we are a normal member of the big family of natureby wang yonghui(主永晖 北京对外经济贸易大学)专家点评:演讲者围绕环境污染的严重性作了一次次的说明。文章的结构严谨，也很
she kindled a third match. again shot up the flame； and now she was sitting under a most beautiful christmas tree ,far l