▲after dusk 

It’ll cool down this evening, after dusk. 今天今晚，夜幕降临之后，天气会凉快下来。

▲at dusk 

At dusk the lights of the city come on. 黄昏时分城里的灯都亮了。

Only a few stars shine at dusk. 黄昏时分只有几颗星星闪烁。

The park is close to the public at dusk. 公园每天黄昏时刻停止开放。

▲before dusk 

It seems probable that he will arrive before dusk. 他似乎有可能黄昏前到达。

We climbed a further thousand feet before dusk. 我们在夜幕降临之前又爬了1000英尺。

▲by dusk

By dusk the news had spread through the city. 到黄昏时消息已传遍全城。

The town's streets were deserted by dusk. 夜幕降临时镇子的街上便空无一人了。

By dusk we were dog-tired and heading for home. 到了傍晚我们累趴下了，于是回家。

▲towards dusk

Towards dusk, a relay of fireman arrived at the scene. 接近黄昏时，接班的消防人员到达了现场。

Towards dusk, we found a cave at the side of the mountain. 接近黄昏时，我们在山坡上发现一个山洞。

▲until dusk

I stayed with her until dusk. 我一直陪她到黄昏。

They waited at the ferry for the boat until dusk. 他们在渡口等船一直等到黄昏。