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Section 49 Water H2O, have you ever thought how important it is to us? Ah, that’s water, isn’t it? Yes. And without it, we can’t live. I know that. I drink it everyday in tea, coffee and juices.
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Rescuers in central Italy continue to search for possible survivors in the rubble of Monday's earthquake as funerals begin for the victims of the disaster. So far, the death toll is 279, which includes at least 20 children. Local and government auth
VOA标准英语2009年(四月)
王亚平太空授课，演示水膜变水球 China's second female astronaut, Wang Yaping, has delivered the country's first-ever video lecture from space. Speaking to students via live video, Ms Wang used spinning tops, a ball, water and a fellow a
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Uninterrupted rainfall has caused afootball stadium to flood so much the goalposts are under water and it nowlooks like nothing more than a giant swimming pool. 强降雨让体育场变成了一个巨大的游泳池。 Heavy storms in the city of Ezh
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Theres a simple way to figure out where the center of mass is. If the big kid is two times as heavy as the little kid, then their mutual center of mass will be two times closer to the big kid than to the little kid. Three times heavier and the center
英语时差8，16
Captain Nemo walked in front, and his companion followed us a few steps to the rear. Conseil and I stayed next to each other, as if daydreaming that through our metal carapaces, a little polite conversation might still be possible! Already I no longe
《海底两万里》中英双语有声读物