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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute? As a bitter winter storm rages on the east coast, it's hard to knock being warm-blooded. But what about the metabolic cost of maintaining a high body-temperature? Well,

发表于:2018-12-02 / 阅读(147) / 评论(0)

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Todd: So Heidi, you are from Mongolia. Could you talk a little bit about what high school is like in Mongolia? Heidi: Oh sure. In Mongolia, we dont have elementary school, secondary school, or high school divided into three parts, but we have from 1s

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Around the first of July, the work horses were hitched to the mowing machine, 七月初，那些耕马给拴到割草机上， and Mr. Zuckerman climbed into the seat and drove into the field. 朱克曼先生坐到割草机的座位上面，把割草机

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WASHINGTON, June 23 (Xinhua) -- Last month was the hottest May since record keeping began in 1880, the U.S. National Oceanic and Atmospheric Administration (NOAA) said Monday. 图片1 The combined average temperature over global land and ocean surfac

发表于:2019-02-06 / 阅读(119) / 评论(0)

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