then

By then, most of the guests had already departed from the gala.

(Chinese) 到那时，大多数宾客已经离开了晚会。

He was still a university student back then, dreaming of becoming a writer.

(Chinese) 那时候他还是个大学生，梦想着成为一名作家。

First, dissolve the yeast in warm water, and then add the flour.

(Chinese) 首先，将酵母溶解在温水中，然后加入面粉。

We toured the museum for two hours and then went for lunch.

(Chinese) 我们参观了两个小时博物馆，然后去吃午饭。