A headache is important because it can be the first warning of a serious condition that could probably be controlled if discovered early.

头痛得重视，因为它可能是一种严重疾病的第一个预兆，如果及早发现的话，这种严重疾病可能会得到控制。

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Scientists are increasingly keen to find out what's going on because they consider the Arctic the "canary in the mine" for global warming—a warning of what's in store for the rest of the world.

科学家们越来越想知道到底发生了什么，因为他们认为北极是全球变暖中“煤矿中的金丝雀”——是对世界其他地方即将发生的事情的警告。

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Both programs will start 1 day later if there is a warning of rainstorms.

如果有暴雨警告，这两个项目都将推迟一天开始。

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Some analysts are warning of dire consequences for both Israelis and Palestinians if Mr.Netanyahu's government does not relent and start working toward a two-state solution.

VOA: standard.2009.04.09

OK, to work. A word of warning: fasten your seat belts.

好了，开始工作，一些警告的话：,系紧你们的安全带。

麻省理工公开课 - 计算机科学及编程导论课程节选

That created a big constituency in favor of a dumb change. There was little warning.

这造就了一种悄无声息的变化,没有人提出警告。

斯坦福公开课 - 经济学课程节选

They are then writing to individuals seeking recompense or warning of the possibility of court action.

BBC: BitTorrent study finds most file-sharers are monitored

He said drivers would be given no warning of where the sensors were located.

BBC: Swindon traffic lights to slow speeding drivers

The label for Eloxatin will contain a "black box"--the FDA's most serious--warning of those side effects.

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