Be lost in

be lost in

埋头于，沉溺于，迷失在……中

This phrase means that someone is very addicted to doing something.

这个短语指的是某人非常投入于做某事，无法自拔。

My mother is lost in the TV series again.

我妈妈又沉浸在电视剧中了。

Every time I listen to that song, I will be lost in it.

我每次一听到那首歌，都会沉溺于其中。