「要紧的事先做」英文怎么说？

first things first 

要紧的事情先做、重要的事情先来

I know you are eager to shop for a car, but first things first, you need to find out how much you can afford to spend. 

我知道你很想买一辆车，但是最重要的是，你要先弄清楚你能买得起多少钱的车子。

First things first, let's have something to eat. 

要紧的是，我们先吃东西吧。

The intro

(Listening Comprehension)

Hey ! How's it going ? It's Mr.Wong here, and the phrase for today is "first things first". It is used to say something that should be done or dealt with first because it is the most important. For example, you want to go shopping, but first things first, you need to figure out how much you can afford to spend. Check it out !

没看懂？请自己查字典！

（这才是真正的学习过程）