I've been slaving away all day trying to get this work finished.

我整天苦干，想把这项工作赶完。

He stares at the hundreds of workers slaving away in the intense sun.

他凝视着几百个正在烈日下苦干的工人们。

When you're busy all day the last thing you want to do is spend hours slaving over a hot stove.

当你忙碌了一整天后，你最不愿意做的事就是花好几个钟头在灼热的火炉边辛苦地劳作。

Yes; slaving amongst strangers!

不错，为陌生人当牛做马！

I've been slaving away in the office.

我一直在办公室埋头苦干。