Noise pollution can be unpleasant or even unbearable（不可忍受的）. It comes in many different forms. For Example, noise coming from a rock concert, (摇滚音乐会)or the sound of karaoke (卡拉OK)coming from your neighbours’ house can be regarded as noise pollution. No matter where the noise comes from, it makes everyone feel uncomfortable. Noise levels are measured（测量） in decibels（dB）（分贝）. The quietest noise that a human ear can detect（测试） is 0dB. The loudest that our ears can bear is 120dB. In noise environments, most people are easy to get angry and cannot sleep peacefully. Students cannot put their hearts into their studies. So, noise pollution must be paid attention to so that everyone can live in a pleasant and peaceful world
牛津实用英语语法:334 不定式表示目的
牛津实用英语语法:284 could/will/would you？等表示请求
牛津实用英语语法:300 wish+ 主语+ 虚拟过去时
牛津实用英语语法:327 besides，however，nevertheless，
牛津实用英语语法:311 间接陈述中的might，ought to，should，wo
牛津实用英语语法:290虚拟语气形式
牛津实用英语语法:285 might表示请求
牛津实用英语语法:326 并列连词
牛津实用英语语法:344 位于某些形容词／分词之后的that从句
牛津实用英语语法:322 let’s，let us，let him／them用于间接引