Doctors issued a warning against eating any fish caught in the river.

医生发出警告不要吃在那条河里捕的鱼。

《牛津词典》

He preceded his speech with a warning against inattention.

他讲话前告诫大家要注意听讲。

youdao

"Look before you leap" is a warning against people acting rashly.

“三思而后行”这条谚语是告诫人们不要鲁莽行事。

youdao

Israeli and Indian media report the Counter-Terrorism Bureau in Jerusalem has upgraded a warning to Israelis and other foreigners traveling in India about a "concrete threat" against Jewish facilities here.

VOA: standard.2009.10.16

But this reading of the Apology as you might say is a kind of brief for freedom of expression and a warning against the dangers of censorship and persecution.

但阅读《苏格拉底自辩篇》，你可能会说,好似一种对言论自由的概述,还有对审查,及迫害危机的警告。

耶鲁公开课 - 政治哲学导论课程节选

Stratfor was one of several organizations earlier this year warning that Mexico could become a failed state if it does not win the war against the criminal elements that hold sway over some areas of the country.

VOA: standard.2009.12.18

And in part it is a warning against making too many enemies on your way up.

ECONOMIST: A tale of two papers

China still has more than 1, 000 missiles targeting the island as a warning against declaring formal independence.

BBC: China-Taiwan trade pact sparks street protest in Taipei

The aftermath of the Soviet withdrawal from Afghanistan is a warning against abrupt departures, leaving ill-resourced governments behind.

ECONOMIST: Afghanistan��s fading hopes