at the crack of dawn
US /æt ðə kræk əv dɔn/
UK /æt ðə kræk əv dɔn/
1.
在黎明时分, 一大早
very early in the morning, at the first sign of light
:
•
We had to leave at the crack of dawn to catch our flight.
我们必须在黎明时分出发赶飞机。
•
The farmers start their work at the crack of dawn.
农民们在黎明时分开始工作。