before dawn

基本解释

In the darkest moments before dawn, a woman returns to her bed.
在黎明前最深的黑暗中，一个女子回到了她的床边。
The division commander ordered that we start the attack before dawn.
师长令我们在拂晓前发起攻击。
《新英汉大辞典》
They then rise in the east just before dawn, again to be visible only a short while, and the cycle recommences.
然后，它们又会在破晓前从东方升起，仅在很短时间内可被看到，再次开始新一轮的循环。

The violence began before dawn, with gunmen in speeding cars killing soldiers and police at checkpoints across Baghdad.
First,they don't meet in the daytime; they meet either early before light,at dawn, or after dark,at night.
首先，他们不在白天聚会;,要么在天亮前的黎明，要么在天黑后的夜晚。
耶鲁公开课 - 新约课程节选
This is why he's continually placing the imaginative origin of the poem back to the very dawn of time, perhaps even back before if you can imagine such a time -- before the very dawn of time.
这就是为什么弥尔顿总是试图把想象中的这首诗的起源,推至时间开始的时候，甚至更早,-如果你们能想象这样一个时间--在时间开始之前。
耶鲁公开课 - 弥尔顿课程节选

The coast guard finally reached the Bozzano family on their rooftop an hour before dawn.
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