天黑之后他们继续工作。

They went on working after dark.

youdao

天黑之后，要将灯光调暗并试着减轻压力。

After dark, dim the lights and try to reduce stress.

youdao

然而它们所喜爱的食物都是在天黑之后才更容易捕捉。

Yet the food they prefer to dine on is easiest to catch after dark.

youdao

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