You might recall from grade school sometimes you put things in parentheses so that your addition happens first, then your multiplication, otherwise multiplication would happen by default first.
你们可能会想起小学时，将一些加法表达式，放在圆括号里，这样加法可以先计算，然后是乘法，否则，乘法默认先发生。
You've got to learn to put first things first.
你应该学会将最要紧的事情摆在第一位。
I know you want to put up some pictures, but first things first we must repaint the wall.
我知道你要挂一些照片，不过要紧的是，我们必须先重新粉刷墙壁。
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