如果一个人 dive into 一件事情，那么意思就是很快很热情地投入到这件事情里去了。

例句

My new course starts next week. I can't wait to dive into the work!

Be careful not to dive into a new relationship too quickly after the last one.

Let's dive into this ice-cream before it melts!

请注意

短语 get stuck into something 意思也是快速投入某件事情。

Alfie's only been at the school for a term, but he's already in the rugby team and the chess club. He's really got stuck in!

短语 get stuck in something 的意思是被某种形势困住了。

I don't want to get stuck in a boring job.

I've been stuck in traffic for hours.