Just then she opened her eyes and gave him a smile.

正好那时她睁开眼睛冲他微笑了一下。

We shall have left school then.

到那时我们就毕业了。

Byron travelled to Italy and then to Greece.

拜伦先去意大利旅行，然后去了希腊。

If I expect you to be punctual, then I should be punctual first.

如果我要求你准时，那么首先我就应该准时。

She has been very busy at work and then there was all that trouble with her son.

她工作一直很忙，另外还有儿子的一大堆麻烦事。

by then

到那时

from then on

从那时起

since then

自那时以来