远离乳腺癌 (1)
Cornell University
Ithaca
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科学60秒:互帮互助等于长命百岁
Jiminy Cricket may not actually hold the door open for his lady friends, but he can still be _____1_____ : researchers from the University of Exeter discovered that when threatened by predators, ...
科学60秒:牡蛎味鲜美 环保价更高
The Chesapeake Bay could get helped by a new antipollution expert: farmed oysters. For decades, the Chesapeake has been ___1___ by excess nutrients, such as nitrogen, from agricultural and munici...
科学60秒:地月水不同 彗星释缘由
The Apollo moon missions ended almost 40 years ago. But for lunar scientists, they're ____1____. Researchers studying rocks brought back by astronauts have found that the moon's scarce water has ...
奥巴马提议适度削减政府开支 (1)
The president says all the programs being eliminated or reduced are wasteful or unnecessary. "We can no longer afford to spend as if deficits don't matter and waste is not our problem. We can n...