They caution that ice should be applied only 20 minutes at a time.

他们还提醒说冷敷每次需要20分钟。

youdao

However, they caution that there are likely to be other ways that cancers can develop resistance.

然而，他们也警告说癌症有可能是以其他方式来产生耐药性。

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They caution that the drug should only be used when there are at least 4 hours of bedtime remaining.

他们警告说，药物应该用在至少还剩有4小时的失眠时间时。

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They caution that the company's plans are still in the early stages and could change.

WSJ: Apple's Silence Feeds Talk of New Gadget

Scientists not involved with the study were also enthralled by the results, although they caution that the study is small and the results are preliminary.

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While they caution that any changes would be relatively modest, particularly near the capital's monuments, their proposal has reactivated a debate that has come and gone over the years, pitting preservationists against advocates of more growth.

WSJ: Is It Time for D.C. to Grow Up?