dawn

When dawn broke (= the first light of the day appeared ) , we were still 50 miles from Calcutta..破晓的时候，我们离加尔各答还有50英里。

I was up at the crack of dawn (= very early in the morning ) to get the plane..我一大早就起来赶飞机。

We worked from dawn to dusk (= through the whole day while it is light ) ..我们从早干到晚。

the cold light of dawn.清冷的晨曦

at dawn,拂晓；天一亮

before dawn,凌晨；黎明前；拂晓

dawn on,开始被理解；渐渐明白

crack of dawn,n. 破晓；黎明