all in a day's work
Definition: nothing special, part of the routine
这句话的意思是“没什么特别的，司空见惯”

例句：

Don't worry about it. It's all in a day's work.
别担心，这没什么特别的，

Cooking is all in a day's work.
烧饭是常有的事儿。

All work and no play makes Jack a dull boy.

Definition: Idiom meaning that you need to have fun in order to be a happy, healthy person
这句话就是传说中的“只工作不玩耍，聪明的孩子也变傻”。

例句：

Go home! Remember: All work and no play makes Jack a dull boy.
快回家吧，要记住：只工作不玩耍，聪明的孩子也变傻。

I'm worried about him. He hasn't yet understood that all work and no play makes jack a dull boy.
我很担心他，他还没有明白过来，只工作不玩耍，聪明的孩子也变傻。

dirty work

Definition: Necessary, but uninteresting, or difficult work
这句话的意思是“必须要做的但很无聊或很难的工作”，其实也就是做苦工，或者是吃力不讨好的工作。

例句：

He did the dirty work on that project.
他在那个项目中做的是吃力不讨好的活儿。

Have you got around to doing the dirty work yet?
你已经在找时间做这个很无聊的工作了吗？

get down to work

Definition: Stop relaxing, focus on important task
这句话的意思是不再放松，开始做重要的事情，完成重要的任务。

例句：

Hey, let's get down to work here!
嘿，咱们该认真开始工作了！

Sorry, I've got to get off the phone and get down to work.
对不起，我必须放下电话开始工作了。

get worked up over something

Definition: become angry or annoyed about something
含义是对什么事情感到生气、恼怒

例句：

He got all worked up over the last exam.
他对上次考试非常生气。

Don't get worked up over the garden. I'll take care of it tomorrow.
别因为花园的事情生气了，我明天会搞定的。

make short work of something

Definition: do something quickly
含义是“很快完成”

例句：

I made short work of the assignment and moved on to the next job.
我很快的就完成了任务开始下一项工作了。

Give it to John. He'll make short work of it.
交给约翰吧，他会很快做完的。