他留下一张字条，大意是他不回来了。

He left a note to the effect that he would not be coming back.

《牛津词典》

他说如果你周五不回来上班的话，就会被解雇。我想他是当真的。

He says you're fired if you're not back at work on Friday. And I think he meant it.

《柯林斯英汉双解大词典》

太空船已经驶进太空，不回来了。

The spacecraft has gone into space. It won't return.

youdao

Again, I don't have data to back this up, but just common sense suggests to me that the common case is if I'm on the subway platform I want to get on that train and maybe I want to get back and where are those two buttons, right?

此外，我没有数据来备份这个，但是常识告诉我，常见的情况是,如果我站在地铁站台上，我想乘上地铁,可能我还想回来,那么哪里能找到这两个按钮，对不？

哈佛公开课 - 计算机科学课程节选

So some of the Welles's material comes back in but it's never, doesn't comes back in the way Welles had done it.

所以好多威尔斯的形回来了,但是他的神却没有,不像威尔斯原来做的那样。

麻省理工公开课 - 电影哲学课程节选

So, if you by chance, I know it's very rare, but if by chance you don't get the class you can always follow up later.

如果你们偶然，我知道不太可能，但是如果不小心你们错过了某节课,你们就可以在之后补回来了。

麻省理工公开课 - 固态化学导论课程节选