与坏人交往必须谨慎 He that sups with the devil must have a long spoon
我必须非常谨慎地处理 I need to approach this carefully
发表观点时必须谨慎，因为语言会伤害别人。
We must express our opinions with caution because words can hurt.
但是，尽管我们有各种理由称颂计算机，我们也必须谨慎行事。
But for all the reasons there are to celebrate the computer, we must also act with caution.
显而易见，食品制造商必须谨慎使用带有“非、不含”字样的标签。
It's clear that food manufacturers must tread carefully when it comes to using absence claims.
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