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标题: 求白勇P43T51 [打印本页]

作者: 江南玥夜    时间: 2009-2-24 22:10
标题: 求白勇P43T51

A选项不懂啊~拜托教下解释里的there is one不行,看不懂


作者: 小鹿和小兵    时间: 2009-2-28 19:20

Any medical test will sometimes fail to detect a condition when it is present one and indicate that there is one when it is not?

两个“one”指代的都是前面的condition

两个“it”指代的是test检验的结果

这句话的翻译大概是:一些(病毒),当这种东西存在的时候,检测不到;但是当它不存在的时候,却可以检测到。只medical test存在缺陷。






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