learn to walk before you run 先学走 再学跑；循序渐进；学跑之前先学走

【例句】
What's the rush? Learn to walk before you run. Don't put the cart before the horse.
急什么？先学会走路再学跑步。不要本末倒置。

You must first learn to walk before you try to run.
在想要跑以前，你得先学会走。