Scientists have always been aware of how fear can rule our lives and make us ill.

科学家们从来都知道恐惧是如何严重影响我们的生活并使我们患病的。

《柯林斯英汉双解大词典》

This is why many viruses, such as measles, make us ill only once.

这就是为什么许多病毒，如麻疹，只会使我们生病一次。

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For example, most pets are very dirty and they have a lot of diseases with them which will make us ill.

例如，大多数宠物很脏，他们有很多的疾病，会使我们生病。

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