1. 黎明;拂晓
    Dawn is the time of day when light first appears in the sky, just before the sun rises.

    e.g. Nancy woke at dawn.
           拂晓时分南希醒了。

2. 开端;起始阶段
    The dawn of a period of time or a situation is the beginning of it.

    e.g. We can only guess what went through the mind of a man who could look back to the dawn of powered flight.
           一个能够回想起动力飞行初始阶段的人那时脑子里想了些什么，我们只能够猜测而已。
    e.g. ...the dawn of the radio age.
           无线电时代的开端

3. 初现;出现;开始形成
    If something is dawning, it is beginning to develop or come into existence.

    e.g. Throughout Europe a new railway age, that of the high-speed train, has dawned...
           新的铁路时代——高速铁路时代，在整个欧洲已经开始出现。
    e.g. A new era seemed to be about to dawn for the coach and his young team...
           对于那名教练和他的年轻球队来说，一个崭新的时代似乎即将到来。

4. (一天）到来，开始
    When you say that a particular day dawned, you mean it arrived or began, usually when it became light.

dawn

    e.g. When the great day dawned, the first concern was the weather...
           当那个不同寻常的日子到来时，大家首先关注的是天气。
    e.g. The next day dawned sombre and gloomy.
           第二天拂晓时，天色阴沉昏暗。

5. at the crack of dawn -> see crack

相关词组：dawn on