First,they don't meet in the daytime; they meet either early before light,at dawn, or after dark,at night.

首先，他们不在白天聚会;,要么在天亮前的黎明，要么在天黑后的夜晚。

耶鲁公开课 - 新约课程节选

Maybe you should leave before it gets too dark, so that you don't have to walk too far.

也许你该在天黑之前就动身回去了，这样你就不用走那么远了。

How long实战 - SpeakingMax英语口语达人

The Evening Star is the, roughly speaking, first heavenly body that's visible in the sky as it gets dark, at least at certain times of the year.

粗略说来,昏星就是,天黑时第一个能看见的天体,至少在一年的某个时间段是这样

耶鲁公开课 - 死亡课程节选

Of course, it gets dark in the winter in St. Petersburg about noon.

不过,冬天的圣彼得堡中午之后就天黑了

耶鲁公开课 - 欧洲文明课程节选

And by the time I get home, it's dark.

我回家的时候，天黑了。

中央公园的时光 - SpeakingMax英语口语达人

Does he see me that I am still here when it's getting dark?"

他有没有看到我天黑了还在这里工作"

耶鲁公开课 - 欧洲文明课程节选