I'm just saying take it slow.

我只是说要慢慢来。

Make it fast! (Take it slow!)

让他快！(是否可以慢！)

Be patient and take it slow.

要有耐心，慢慢来。

I told you to take it slow!

我说过要慢慢来的！

We're going to take it slow first.

开头我们要做慢一点。