q=%E6%92%9E%E5%87%BB%E5%9C%B0%E7%90%83%EF%BC%9A%E6%9D%A5%E8%87%AA%E5%B0%8F%E8%A1%8C%E6%98%9F%E5%92%8C%E5%BD%97%E6%98%9F%E7%9A%84%E5%A8%81%E8%83%81%EF%BC%9Aunderstanding+the+threat+to+earth+from+asteroids+and+comets&searchType=standard&isFacet=true&view=standard&rows=10&sortWay=score&sortOrder=desc&curlibcode=HPJY9745&searchWay0=marc&logical0=AND
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撞击地球：来自小行星和彗星的威胁：understanding the threat to earth from asteroids and comets