单词：electric pulley-block
单词：electric pulley-block 相关文章
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
'Big Brutus,' World's Largest Electric Shovel, Turned Into Museum LOURDES GARCIA-NAVARRO, HOST: You never know what roadside attraction you might find along America's byways. Our colleague Melissa Block is on a reporting road trip around the country,
2017年NPR美国国家公共电台2月
Men, said the little prince, set out on their way in express trains, but they do not know what they are looking for. 那些人们，他们往快车里拥挤，但是他们却不知道要寻找什么。 Then they rush about, and get excited, and turn
小王子
A ban on electric bicycles in New York City is hurting delivery workers who depend on them to earn a living. Many of the workers are immigrants. Electric bicycles, or e-bikes, have foot-powered pedals like other bicycles. But they also have electric-
2018年VOA慢速英语(二)月
Automakers are rolling out their new electric vehicles at the 2018 Beijing Motor Show, the motor industry's biggest sales event this year. Carmakers expect new growth in China's market despite the looming threat of a trade war between China and the U
2018CRI中国国际广播电台
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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