单词：low-level solid waste(s)
单词：low-level solid waste(s) 相关文章
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
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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
But we must leave the pin, for it is the pin itself that holds the parts together. 但是必须把大头针留下，因为两块东西就是让大头针来固定的。 Pins are made of many sizes, and are either black or white in colour. They are pre
英国学生科学读本
WASHINGTON, March 30 (Xinhua) -- A trace amount of radioactive(辐射性的) iodine（碘） has been found in a sample of milk from the west state of Washington, the U.S. Environmental Protection Agency and the Food and Drug Administration (FDA) sai
英语新闻
Cannot fall, never do regret Know just what is being said know the risk you take Keep your head above it all Sure you can fall but not now you gotta prove something new, being you, being you Can't feel, keep from asking why be the strongest at goodby
美国乡村音乐
Waste your life 浪费生命 You're living a life you don't like 你在过着自己不喜欢的生活 The way I measure success is by someone's level of happiness. Are you happy? If not, then you should change something! Even a feeling of contentment
英语听力广播—Listening