单词：liquid waste area sump pump
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William Boynton is professor of planetary sciences at the University of Arizona. And he's dedicated his life to looking for water on Mars. The link between life and water is very strong. Even here in
火星生命
Last time we talked about how astronauts eat and drink under weightless conditions in space. Today we'll cover the next question kids love to ask-how do astronauts go to the bathroom in space? It may sound silly, but it's really a good question, beca
英语时差8，16
图片1 slim adj. 苗条的，纤细的 例句：Mary was born with a slim figure. 玛丽生来就有一个苗条的身材。 slot n. 缝，狭槽 例句：Pick up the receiver and deposit a coin in the slot. 拿起听筒之后，将一个硬币放进这
漫画搞定六级词汇（文本+音频）
It may sound silly, but its really a good question, because weightlessness does make a visit to the latrine a tricky proposition. Weightlessness poses two main problems in the bathroom. The first is that an astronaut could drift away from the bowl at
英语听力文摘 English Digest
Questions Remain on Ebola Waste Disposal 埃博拉的废物处理费问题 Ebola is contracted by coming into contact with the bodily fluids of an infected person. Health workers wear spacesuit-like protective gear when treating patients. But researc
VOA标准英语2014年(十二月)
Voice 1 Thank you for joining us for Spotlight. Im Liz Waid. Voice 2 And Im Joshua Leo. Spotlight uses a special English method of broadcasting. It is easier for people to understand no matter where in the world they live. Voice 1 Angel Rodriguez liv
环球英语 Spotlight