【對焦中英翻譯】搞清楚「黎明」、「一大早/七早八早」、「天一亮」的英文

黎明 ：dawn 

有時我在黎明時分起床 Sometimes I rose at dawn.

 
很早/一大早/七早八早 ：bright and early
We will be getting up bright and early in the morning. 我們早上會很早起。
We have to be up bright and early to make it to the airport on time. 我們必須很早起床才能準時趕到機場。
It's a long trip, so we'll have to start out bright and early.路途很遠，我們必須一大早出發。
I don’t know why my brother got up bright and early today.我不知道弟弟今天為什麼七早八早就起床。

天一亮 ：at the crack of dawn
I want to leave at the crack of dawn. 我想天一亮就走。