foul up例句

There are serious risks that laboratories may foul up these tests.
实验室很有可能搞砸这些试验。

Why do some people foul up and become criminals?
为什么有些人会走上歧途变成罪犯 呢 ?

Nothing could foul up their militant spirit.
什么也不能挫伤他们的斗志.

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