你不能一辈子追求虚无缥缈的东西。

You can't spend all your life chasing shadows.

《牛津词典》

在网络上你可以去看可以去想，可以去记忆可以去相信，但不要试图去拥有。那是一个虚无缥缈的世界，没有是么东西是属于你的。

You can either see or think online. You can also remember and believe, but never try to own. It is an illusory world in which nothings belongs to you.

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但是研究人员将这种由来已久的说法看作是虚无缥缈的，并且声称三分之一的人将通过吃脏的东西置自己于“隐形杀手”的危害健康的状态。

But researchers have branded the age-old convention a myth - and claim a third of us are putting our health at risk of a 'silent killer' by eating dirty food.

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