三价稀土分子蒸气激光器

Earth and Sky:Aqua Spacecraft 水资源监测太空船

Aqua Spacecraft 水资源监测太空船 NASA's latest and most ambitious weather satellite is measuring Earth's water cycle. Learn more about the Aqua satellite -- today on Earth and Sky. DB: I'm Deborah Byrd. JB: And I'm Joel Block for Earth and Sky. This

发表于:2018-12-07 / 阅读(47) / 评论(0)

(科普英语)Earth and Sky

Earth and Sky:Global Warming and Ozone 全球变暖和臭氧

Global Warming and Ozone 全球变暖和臭氧 Could the coming century bring a new threat to the ozone layer? Discover one scientist's model of the effect of global warming and greenhouse gases on ozone -- on today's Earth and Sky. DB: This is Earth and S

发表于:2019-01-02 / 阅读(116) / 评论(0)

(科普英语)Earth and Sky

英伦广角激光可帮助啮齿类动物受损的牙齿再次生长

Ouch! About a quarter of all school-age kids will break or otherwise damage a tooth. Adults have their share of cracked chompers too. But what if fixing a busted bicuspid was as easy as zapping it with a laser? Preliminary work with young rats has mo

发表于:2019-01-02 / 阅读(75) / 评论(0)

英伦广角

VOA常速英语2007年-Scientist in Texas Runs NASA's Lunar Laser Prog

By Paul Sisco Washington 14 November 2007 At the McDonald Observatory in western Texas, a unique space program has been quietly underway for more than 30 years. It is called the Lunar Laser Ranging Program. VOA's Paul Sisco has more. Research scienti

发表于:2019-01-31 / 阅读(72) / 评论(0)

VOA常速英语2007年（十一月）

Vast water vapor beyond solar system found

BEIJING, Oct. 21 (Xinhuanet) -- A team of European researchers announced that they have found vast water vapor out of our solar system, according to a study in the U.S. journal Science Friday. Using Herschel Space Observatory, a European Space Agency

发表于:2019-02-09 / 阅读(63) / 评论(0)

英语新闻

万物简史第386期:浩瀚的海洋(5)

There are 320 million cubic miles of water on Earth and that is all we're ever going to get. 地球上有13亿立方公里水，这是全部。 The system is closed: practically speaking, nothing can be added or subtracted. 系统已经关闭，说得明

发表于:2019-02-25 / 阅读(57) / 评论(0)

万物简史

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学英语单词

acyclic set

aircraft pitch control

alternate magnet

antimetastatic

antolini

as sanamayn (es sanamein)

best-ofs

boulevardiers

california tree poppies

canvas opera

checotah