医生使用虚拟现实技术为手术做准备

Doctors Use Virtual Reality to Prepare for Surgeries Felicia Luna had a really bad headache. She said the painful pressure felt like someone was squeezing my head really tight. The pain became so bad that the 41-year-old woman could not lie down and

发表于:2019-01-02 / 阅读(38) / 评论(0)

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The Iran sanctions announcement was the second from the State Department in two days, and reflects a stepped-up U.S. effort to try to prod Iran back to nuclear talks with economic pressure. Deputy Secretary of State James Steinberg told reporters tha

发表于:2019-01-14 / 阅读(54) / 评论(0)

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By Carolyn Weaver Washington, DC 09 February 2006 watch Brookhaven report Experimental results at Brookhaven National Laboratory’s supercollider that replicate in miniature the “Big Bang,” when

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US Calls Arctic Council Meeting 'Historic'

U.S. Secretary of State Hillary Clinton is expected to join fellow foreign ministers from the eight-nation Arctic Council on Thursday in Greenland's capital, Nuuk, for a meeting on polar region issues, including the receding Arctic ice cap. The meeti

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英语新闻

TED演讲视频:利用益虫来抑制害虫

Shimom Steinberg 讨论利用益虫来抑制害虫 Shimom Steinberg 在TEDxTelAviv特拉维夫上谈论了害虫和益虫的差别，并且提出使用益虫来对抗害虫的想法, 期望不用农药也能获得丰收。

发表于:2019-02-21 / 阅读(30) / 评论(0)

TED演讲视频集

TED演讲:我们的意识(2)

Now, this nice picture shows a thought-balloon, a thought-bubble. 好了，这张图展示的是一个思维泡泡。 I think everybody understands what that means. 我想大家都知道这是什么意思。 That's supposed to exhibit the stream of c

发表于:2019-03-04 / 阅读(70) / 评论(0)

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achromatic colour

Archimedean screw bow unit

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carbon nitrogen ratio