I would caution against getting too involved.

我要提出警告，别介入得太深。

《牛津词典》

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But the scientists caution against use of this type of test, at least in the near term.

但是科学家警告使用这种类型的测试，至少在短期内。

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Despite that trend, analysts caution against drawing sweeping conclusions from the far right's success in France.

CNN: Is the far right gaining ground in Europe?

Who was there to caution against the mad stampede of telecoms firms into fibre-optic cable?

ECONOMIST: Face value

Many nutritionists actually caution against using injectable vitamin supplements because the quantities are not regulated.

CNN: Vitamin cafes: Japan's latest health injection