In relative young people，it is high enough。

beautifulwind · 2011-10-18 22:47:18Z

In relative young people，it is high enough。简介

来源: beautifulwind 于 2011-10-18 22:47:18 [档案] [博客] [旧帖] [给我悄悄话] 阅读数 : (119 bytes)

回答: 可也不能段章取义哈。由 EnLearner 于 2011-10-18 22:42:20

one in every 50,000 marathon runners will experience a life-threatening condition during a race

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