有一天他突然离开了。

One day he just upped and left.

《柯林斯英汉双解大词典》

我对他突然离开大学感到惊奇。

I marvelled that he suddenly left college.

youdao

她突然间靠向威尔逊，然后威尔逊退缩并转身离开。然后他暴露出他可憎的喋喋不休，假装规矩。

She suddenly comes on to Wilson, whereupon he recoils and backs away. Then he exposed his obscene chatter, pretending to behave properly.

youdao