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。

youdao

This is not the first warning.

这不是第一次警告。

youdao

This is your first warning.

这是对你们的第一次警告。

youdao

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

Guan went on the clock on 12, and received his first warning at the 13th.

NPR: Even With 1-Stroke Penalty, 14-Year-Old Makes Cut

That allowed NBC Universal to break even on them after first warning that it expected them to be a loss leader.

FORBES: With 'Today' Faltering, NBC Reassigns Executive Producer

Here is the first warning to a horse killer from the FDA for falsified EID and the horse was positive for bute.

FORBES: Over Public Outcry, Governor Signs Horse Slaughter Bill