"A tsunami is a series of waves and the first wave may not be the largest," said a bulletin from the Pacific Tsunami Warning Centre.

太平洋海啸预警中心的公告称，“海啸是一系列的波浪，第一波并不一定是最大的。”

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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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A high-tech zebra crossing with flashing lights and audio warning was put into use for the first time in Bishan district, Chongqing a few months ago.

几个月前，一条高科技斑马线在重庆璧山区首次投入使用，该斑马线配有闪光灯和音频警告。

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You might have to stay away from low-lying areas for as long as twenty hours after the first warning.

VOA: special.2011.06.07

The Cain and Abel story which is in Genesis 4:1 through 16 this is the story of the first murder, and it's a murder that happens despite God's warning to Cain that it's possible to master the urge to violence by an act of will.

创世纪》第四章，1到16节，讲述的是该隐和亚伯的故事6,这是人类历史上第一宗谋杀案,尽管上帝警告该隐,邪念会让人暴力相向。

耶鲁公开课 - 旧约导论课程节选

Professor Pace has a warning for people who let water hit their face when they first turn on the shower.

VOA: special.2009.10.13

Mr. Kogut said the department should give a warning first and then come back and issue a violation if it isn't corrected.

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The warning first came from an imam in Toronto, who in turn was tipped off by suspicious behavior on the part of one of the suspect.

WSJ: Suspect in Canada terror plot denies charges

The national system for Indonesia, the Indonesian Tsunami Early Warning System (InaTEWS) issued the first warning to national authorities within five minutes of the sub-sea earthquake, which allowed many communities to take the necessary precautions.

UNESCO: Building the Wealth of Nations