倒滤层;反滤层;反向滤池

But the HEPA filter for Olivers Vibe got dirty very quickly. And, it was not cleanableit was simply replaceable. When it turned filthy brown, Oliver went back to Target to buy a new filter. Oddly, Target sold the F15 belt for the Vibe, but not the fi

发表于:2018-12-11 / 阅读(70) / 评论(0) 分类 365个英语简短小故事

From VOA Learning English, this is the Health Lifestyle report. In parts of India, it is not uncommon to see people wearing a mask over their nose and mouth. The capital, New Delhi, has some of the world's dirtiest air. The pollution was a call for a

发表于:2019-01-03 / 阅读(65) / 评论(0) 分类 2018年VOA慢速英语(一)月

当主语在谓语前出现时叫顺序(the natural order)。在某些情况下,我们可以把谓语成分放在主语前面,这种词序叫做倒装( the inverted order)。 倒装分两种:配合语法条例的倒装,叫grammatical

发表于:2019-01-09 / 阅读(42) / 评论(0) 分类 英文语法词汇

By Tabinda Naeem Washington, D.C. 21 May 2007 Two years ago, the National Academy of Engineering established the Grainger Challenge Prize for Sustainability. This $1 million award was designed to challenge the world's scientists to develop a practica

发表于:2019-02-03 / 阅读(92) / 评论(0) 分类 2007年VOA标准英语(五月)

accredited journalist n.特派记者 advertisement n.广告 advance n.预发消息;预写消息 affair n.桃色新闻;绯闻 anecdote n.趣闻轶事 assignment n.采写任务 attribution n.消息出处;消息来源 back alley news n.小道消息 back

发表于:2019-02-06 / 阅读(46) / 评论(0) 分类 实用英语

新闻的种类很多,按分类标准的不同,有各种不同的分类方法。如按照事件的性质分类,新闻可分为硬新闻(hard news)和软新闻(soft news)两大类,硬新闻也就是纯新闻消息报道,指题材严肃

发表于:2019-02-18 / 阅读(94) / 评论(0) 分类 实用英语