Definition
Used to indicate that more important matters should be dealt with before less important ones.
重要事項先行
First things first, we should prioritize, so let's complete this report.
首先，我們應該優先考慮，所以讓我們完成這份報告。
Before we can relax, first things first, let's finish all the work.
在我們可以放鬆之前，首先，讓我們完成所有工作。
We need to address the budget, first things first, and we can discuss other things later.
我們需要解決預算問題，首先，然後我們可以稍後討論其他事情。