These days they were up at the crack of dawn.

这些天他们在破晓时就起床。

《柯林斯英汉双解大词典》

Helli: ok! Say no more... I would also have woken up at the crack of dawn to get to the bathroom first!

知道了！无须多说…那样的话如果我需要第一个进浴室也得在破晓时分起床了！

youdao

My grandpa used to tell me about how he had to get up at the crack of dawn every day to start work on the farm.

我爷爷曾经告诉我，他每天必须在破晓时分就起床开始在农场工作。

youdao

After his crack-up,however, he discovered he was no longer welcome at the magazines that had paid him well.

VOA: special.2010.11.28

This day is so important that journalists and photographers get up at the crack of dawn to chronicle the shopping frenzy.

FORBES: Black Friday Evolves into Black November and Everyone Benefits

How good did it feel when you woke up this morning knowing I don't have to get up at the crack of dawn?

NPR: Steroids Report Names 85 Baseball Players

For Selmer Bringsjord, who heads RPI's department of cognitive science, getting a crack at Watson is like a car aficionado being tossed the keys to a souped-up Lamborghini.

WSJ: IBM sends Watson to NY college to boost its skills