低水位安全装置

SSS 2012-03-29

This is Scientific Americans 60 Second Science, I am Sophie Bushwick, got a minute. Kindles, Nooks and other e-readers catch flack for threatening the future of printed books. But reading itself may get a boost from the devices. For example, a study

发表于:2018-12-24 / 阅读(67) / 评论(0)

Scientific American(三)月

Water Storage Systems

Broadcast: May 12, 2003 By Jill Moss This is the VOA Special English Development Report. Each year, millions of people in Bangladesh drink ground water that has been polluted by naturally high levels

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VOA2003（上）-社会广角

VOA标准英语2008年-Low Technology Solutions Find Favor in Developi

By Cathy Majtenyi Nairobi 19 May 2008 Fuel efficient stoves and ceramic water purifiers are two examples of low-tech innovations that can help people in poor countries improve their quality of life. Because what is known as appropriate technology usu

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VOA标准英语2008年（五月）

中国采用更严格汽车碰撞标准

Among seven tested car models, three were graded five-star including Mazda's Atenza, Ruiteng from SAIC Motor and Great Wall Motor's Haval, while three others were rated four star and one three star. This is said to be the strictest assessment imposed

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英语新闻

U.S. finds low levels of radiation in milk

WASHINGTON, March 30 (Xinhua) -- A trace amount of radioactive(辐射性的) iodine（碘） has been found in a sample of milk from the west state of Washington, the U.S. Environmental Protection Agency and the Food and Drug Administration (FDA) sai

发表于:2019-02-11 / 阅读(60) / 评论(0)

英语新闻

赖世雄进阶英语词汇3500 Unit91

assure vt.向（某人）保证 I can assure you that this is the best restaurant in town. 我向你保证，这是城里最棒的一家餐厅。 Sam wasn't able to assure her of his support. 山姆无法向她保证要支持她。 assurance n.保证；

发表于:2019-03-17 / 阅读(274) / 评论(0)

赖世雄进阶英语词汇3500

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学英语单词

armoured combat vehicles

Baird Inlet

balanced antenna tuning circuit

Beboto

blue lead