佩德罗每天早上天不亮就起床。

Pedro got up every morning before daybreak.

《柯林斯英汉双解大词典》

原来头像不亮的人，动态还会自动更新。

The original picture does not shine, the dynamic will automatically update.

youdao

他整晚都无法入睡，第二天天不亮他就跑去找他。

He could not sleep all that night, and went to him in the morning before sunrise.

youdao

So this is like your children's book representation of the Christian God, and there it is as a blinding white cloud. You wouldn't even need the curls and the beard if you just had the blinding and the white.

这就像你们儿童书里上帝的代表，它就像一朵亮白的云，你甚至不需要,卷曲状和胡须状的图像，即使你只看的，亮白。

耶鲁公开课 - 1945年后的美国小说课程节选