硫化物炉瘤

Supermassive Black Holes 超大质量黑洞 - 15

In January 2000, John Dubinski set out to calculate the final fate of our galaxy, the Milky Way, and that of our nearest neighbor, Andromeda. The Andromeda galaxy is actually falling towards the Milky

发表于:2018-12-07 / 阅读(297) / 评论(0)

超大质量黑洞

CNN 2009-11-25

I couldn't get over this mess. The federal government is confirming what Joan Glickman of Pompano Beach, Florida suspected all along. Tainted drywall from China is giving off a harmful gas that's turning her air-conditioning wiring black, causing it

发表于:2018-12-20 / 阅读(51) / 评论(0)

cnn2009年(十一)月

60秒科学:Mercury Fillings Seem Safer over Time

Mercury Fillings Seem Safer over Time A study in the journal Chemical Research in Toxicology finds that mercury on the surface of dental fillings slowly turns to an inert sulfide compound, which should keep the mercury from harming the nervous system

发表于:2019-01-02 / 阅读(105) / 评论(0)

60秒科学

Greenspan Predicts US Job Growth Soon

Greenspan Predicts US Job Growth Soon Barry Woods U.S. central bank chief Alan Greenspan told a congressional committee Thursday that the United States must resist protectionism . Mr. Greenspan told t

发表于:2019-01-07 / 阅读(50) / 评论(0)

VOA2004（上）--各类新闻

Garlic: The Key to a Long Life?

From VOA Learning English, this is the Health Lifestyle report. Garlic is one of the most common cooking ingredients around the world. Many dishes in Europe, Africa, Asia and the Americas use this strong-flavored vegetable. Garlic is similar to other

发表于:2019-01-12 / 阅读(84) / 评论(0)

2016年VOA慢速英语(十二)月

雅思阅读词汇：火山爆发(一)

火山爆发 The Eruption of Volcano abundant adj. 丰富的，富余的 accretion n. 增长 accumulation n. 积聚，堆积物 active volcano 活火山 Alaska Volcano Observatory 阿拉斯加州火山观

发表于:2019-02-02 / 阅读(89) / 评论(0)

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学英语单词

AAASS

adjoint partial differential equation

afan

air-blast circuit breaker