[电子] 近代滤波器理论

365个英语简短小故事-335. The Vacuum Cleaner Filter(2)

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)

365个英语简短小故事

ECONOMICS REPORT - Work on 'Game Theory' Wins Nobel Prize fo

ECONOMICS REPORT - Work on 'Game Theory' Wins Nobel Prize for Two Economists By Mario Ritter Broadcast: Friday, October 14, 2005 I'm Bob Doughty with the VOA Special English Economics Report. Robert A

发表于:2019-01-02 / 阅读(72) / 评论(0)

健康与经济

Indian Scientists Invent Nose Filter to Protect Against Air Pollution

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)

2018年VOA慢速英语(一)月

Modern English 洋话连篇（五十三）

1. I'm very/really/terribly/awfully/extremely sorry. 十分抱歉！ 2. Forgive me for breaking my promise. 原谅我食言。 3. Let's forgive and forget. 让我们摈弃前嫌。 4. I've heard so mu

发表于:2019-01-03 / 阅读(24) / 评论(0)

Modern English 洋话连篇

2007年VOA标准英语-Latest Research Says Modern Man Comes from Afri

By Jessica Berman Washington 19 July 2007 The origin of modern humans has been a heated topic among anthropologists, who have debated whether modern man came from Africa or somewhere else. Now, researchers say they have they have proof beyond dispute

发表于:2019-01-12 / 阅读(78) / 评论(0)

2007年VOA标准英语（七月）

2007年VOA标准英语-Water Filter Wins Developer Engineering Prize

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)

2007年VOA标准英语（五月）

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学英语单词

application chamber pipe