We must finish the job no matter what may happen.

我们怎么着也得把这项工作干完。

On the job no, on my breaks yes.

工作时不吸；休息时吸。

We'll have to finish the job no matter how long it takes.

无论花多长时间，我们都必须完成工作。

I have always been a conscientious person and I strive to do a good job no matter what position I am in.

一直以来我都是一个正直的人，无论在哪个职位上我都会努力把工作做好。