Let me just give some example of-- sometimes people are very slow to see the obvious, or it seems so in history.

我来举些例子-,有时人们对显见之物的反应反而比较滞后，起码从历史上来看是这样的。

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The notion is, if there's something foreign that's being produced inside this cell, then that cell must have been corrupted in some way and it has to be gotten rid of.

免疫反应的规矩是这样的,如果某些外源物在你细胞内产生,那说明这个细胞的某些地方,已经被损害了所以必须被清除掉

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