突然一下子就成了这样，我们都笑了起来。

It came on so sudden we were like laughing.

youdao

像这样逐步的调整就寝的时间往往比突然一下子早睡一个时间效果更好。

Gradually adjusting your schedule like this usually works better than suddenly trying to go to sleep an hour earlier.

youdao

我就这样莫名其妙陷进了一种小情绪，就那么突然一下子掉进去了。

So somehow I stuck a little emotion, then all of a sudden fall on the go.

youdao

That he's not going to suddenly be left adrift.

他不会突然一下子被抛弃。

I'm good at 课堂 - SpeakingMax英语口语达人