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arc弧线 arch拱 astronomy天文学 aerodynamic空气动力学的 axis轴 comet彗星 dense稠密 eject驱逐 doctrine学说 gravel砂砾 hemisphere半球 galaxy银河，星系 gauge估计 meteorology气象学 magnitude大小 perpendicular垂直的
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By Melinda Smith Washington 10 July 2007 A recent study in the Journal of the American Medical Association shows that older people who carry certain genes are more susceptible to a loss of their central vision. That loss of sight is an advanced form
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活泼可爱戴尔广告歌：Chordettes - Lollipop 记得戴尔那个广告里几个大男人特别有童趣地在那唱Lollipop~lollipop么？貌似这首歌在之前真知棒的广告中也有出现过，两首广告歌都是从一首经典老歌改
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HEALTH REPORT - Progression of Age-Related Macular Degeneration By Nancy Steinbach Broadcast: Wednesday, January 28, 2004 This is Phoebe Zimmermann with the VOA Special English Health Report. American
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The sun has gone completely blank for the second time this month suggesting that Earth could be heading for a mini ICE AGE. 本月已经第二次出现太阳黑子完全消失，这预示着地球可能迎来迷你冰期。 Earlier this month, there
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What Makes Hybrid Cars So Efficient ? 最快的车是什么？ Don : Hybrid cars are known as hybrid s because they use an electric motor to augment the performance of a small, efficient gasoline engine. But this isnt the only reason hybrid s are mor
英语听力文摘 English Digest