层用无烟煤的砂滤器

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

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

Sand and Stone 沙子和石头

The story goes that two friends were walking through the desert. During some point of the journey they had an argument, and one friend slapped the other one in the face. 两个朋友结伴穿越沙漠，旅途中二人突然吵了起来，其中一个掴

发表于:2019-01-30 / 阅读(79) / 评论(0)

实用英语

专业术语-财务英语词汇R25

发表于:2019-02-01 / 阅读(73) / 评论(0)

财会英语

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）

专业术语-财务英语词汇P19

price range 价格变动幅度 price relative 相对价格；比价 price survey 价格统计调查 price transparency 价格透明度 price trend 价格趋势 price variation 价格变动 price-cappi

发表于:2019-02-17 / 阅读(59) / 评论(0)

财会英语

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asymptotic coding gain