单词:spatial filter function
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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
小作文: 表格题,欧洲一个国家的人们2000年和2010年对环保问题做的调查,一共三个表格,第一个关于循环利用,是否觉得有必要推广, yes, no, don't know; 第二个how often do you use environmentally frie
听广告学英语:RICHON Aficio Digital Multi-function System理光数码多功能系统 原文:Mary:Everybody calls me a multi-function secretary. One of her bosses (gives her a pad of paper):Mary, pick up this. Mary:Because I have to serve several bosses. Anothe
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
Researchers have found that peoples' mental abilities peak at 22 before beginning to deteriorate just five years later。 研究人员发现,人的智力在22岁时达到顶峰,而仅在五年之后就会开始衰退。 Professor Timothy Salthous
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