痕量污染

MARY LOUISE KELLY, HOST: The phrase leave no trace is often used to describe good behavior in national parks, meaning enjoy the scenery, and then leave the park exactly as pristine as you found it. The new movie Leave No Trace is about a father and d

发表于:2018-12-18 / 阅读(53) / 评论(0) 分类 2018年NPR美国国家公共电台7月

环境问题一直雅思口语中经久不衰,比如近水之地、家乡可改变的地方、你关注的环境问题等等...下面雅思频道就为同学们整理了环境问题相关的词汇,希望同学们可以用到雅思口语话题中,

发表于:2018-12-19 / 阅读(278) / 评论(0) 分类 雅思英语

星级典句: 第一句:You may have another certificate showing the goods to be free from radioactive contamination. 你们要开具另一份证明书,以证明货物没有受放射线污染。 A: Mr. White, any other requirements? 怀特先生,

发表于:2018-12-26 / 阅读(31) / 评论(0) 分类 天天商务口语

污染物 aerosols气溶胶 / 气雾剂 agricultural wastes农业废物 asbestos石棉 commercial noise商业噪音 composite pollution混合污染 dioxins二恶英 hazardous substances危险物质 hazardous wastes危险废物 heavy metals重金属 h

发表于:2019-01-03 / 阅读(117) / 评论(0) 分类 英文语法词汇

By Peter Heinlein New York City 05 October 2007 Runners on the streets of New York are commonplace this time of year. There is the marathon next month, and occasionally, other organized runs. But one annual event has skyrocketed to prominence in rece

发表于:2019-02-03 / 阅读(101) / 评论(0) 分类 2007年VOA常速英语(十月)

每一日你所付出的代价都比前一日高,因为你的生命又消短了一天,所以每一日你都要更积极。今天太宝贵,不应该为酸苦的忧虑和辛涩的悔恨所销蚀,抬

发表于:2019-02-20 / 阅读(67) / 评论(0) 分类 英文语法词汇