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Electric Fish 发电鱼 One way that Harold Zakon and his team find fish to study is to put electrical detectors into the bottom of murky streams in Venezuela. This works because certain fish emit pulses of electricity. Discover electric fish -- on tod
(科普英语)Earth and Sky
Scientists at the Massachusetts Institute of Technology have turned to Mother Nature for inspiration, inventing a device that mimics photosynthesis, the process plants use to convert sunlight and water into usable energy. MIT chemistry professor Dani
VOA标准英语2011年(四月)
An estimated 20 percent of the population has trouble working with numbers. That's as many as one person in five with some sort of numerical disability. The British researchers are exploring ways to stimulate the brain to improve the ability to under
VOA标准英语2010年(十一)月
By Kent Klein White House 27 October 2009 President Barack Obama speaks during his tour of the DeSoto Next Generation Solar Energy Center in Arcadia, Florida, 27 Oct 2009 U.S. President Barack Obama says the government will spend $3.4 billion to upd
VOA标准英语2009年(十月)
我们今天要学的习惯用语都包括这样一个关键的词，stitch。 Stitch这个词可以用做名词也可以用做动词，stitch作名词的时候最常用的意思是缝纫的针脚，而当动词的时候就常常解释为缝纫了。
美国习惯用语
BEIJING, Sept. 6 (Xinhuanet) -- Scientists from Tufts University of the U.S. have created the world's smallest electrical motor in a single molecule. The finding was published in the journal Nature Nanotechnology on Monday. In the research, scientist
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