下面就是新东方在线雅思频道为大家收集整理的雅思写作常用词汇：释放/发射，供大家参考。更多雅思报名官网的最新消息，最新、最专业的雅思备考资料，新东方在线雅思频道将第一时间为大家发布。

　　release[释放/发射]

　　-eg: Air pollution is caused by the release of chemicals and particles into the atmosphere.;

　　emission[排放/发出]

　　[拓]emission reduction减排

　　-eg: The restriction of the number of cars can reduce greenhouse gas emission to a large extent.