单词：liquid oxygen generator
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[00:00.00] MODULE THREE [00:03.94]Unit three [00:08.41]2.Listen and say the poem. [00:15.22]Who has seen the wind? [00:23.03]Not I or you. [00:25.40]But when the leaves are moving,The wind is pasing through. [00:30.97]Who has seen the wind? [00:33.55
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April.13th, 1970. Apollo XIII is crippled on its way to the moon when a tank containing liquid oxygen bursts in its command module. The 3 astronauts on board are forced to return to Earth relying on their lunar module as a lifeboat in space. 1743. Th
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The U.S. space agency is moving ahead with preparations for Thursday's scheduled launch of the space shuttle(航天飞机) Discovery on its mission to the International Space Station. NASA said it was loading liquid oxygen and liquid hydrogen into th
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