work out. 锻炼

work one’s butt off 努力做某事

at work 在上班

get off work 下班

It’s not gonna work.

这个办法行不通。

It’ll work.

这个办法可以。

I’ve been working my butt off to work out.

我最近有努力在锻炼呀。

I’ve been working my butt( ass) off to learn English.

我最近都在努力学英语呢。

What time do you get off work?

你几点下班？

I’m at work. Talk to you later.

我正在上班，有空再打给你哈~