用Mp3背六级单词045

maintenance inflict identification unemployment intensify decay idiom outbreak idleness beam overwhelming shipwreck graphite thrifty preset misfortune untie compression immortal weary roam transplant impartial vocal

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机械类词汇大全-45

1849 、 静摩擦 staticfriction 1850 、 颈轴承 journalbearing 1851 、 颈缩 necking 1852 、 频带宽度 bandwidth 1853 、 频率 frequency 1854 、 头座 headstock 1855 、 阈值；临界值

商务口语第67讲:制造工程(2)

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Earth and Sky:Sunscreened Plants 遮光植物

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Earth and Sky:Amazon GIS 亚马逊地理信息系统

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电信专业英英词典D-4

D type Channel Bank A D type channel bank is channel termination equipment used for combining (multiplexing) individual analog channel signals on a time division basis. D type channel banks provide in

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Study finds chest compressions are the real life-saver Art Chimes | St. Louis, Missouri 29 July 2010 Cardiopulmonary resuscitation, or CPR, has been around in its modern form for about 50 years. Its rhythms of chest compressions and mouth-to-mouth br

Small asteroid to pass Earth: NASA

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Broadcast: April 18, 2003 by Caty Weaver and George Grow. This is the VOA Special English Environment Report. On April twenty-second, millions of Americans and people around the world will observe the

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Earth Day events were held around the globe Sunday, including in Washington. Inclement weather kept away all but the most-dedicated environmentalists. Months of near-drought conditions gave way to steady rain that drenched the nations capital and the

Asteroid buzzes Earth harmlessly

BEIJING, June 28 (Xinhuanet) -- A truck-sized asteroid passed over the Atlantic Ocean within 7,500 miles of the Earth on Monday, according to NASA's Jet Propulsion Laboratory. The space rock, called asteroid 2011 MD, is the second space rock to zip e

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Millions of people around the world celebrated Earth Day Friday by pledging to commit personal acts of green to improve the environment(环境). This is the 41st anniversary of the first Earth Day, observed in the United States in the aftermath of a

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