我,懂了英语怎么说。?

I see.
I know.
I understand.

术语

you got it
或是
roger that

I see
I got it!
now I understand

我懂了: 1. I get it 2. I see
现在我想我懂了: Now I think I know
我全懂了: I Feel It All
但我现在终于懂了，: But now I know

口语中最常用
I see
或者 Igot it

Oh, I see.
Oh, I got it.
Oh, I know.
Oh, I understand.
But I don't understand what you're waiting for.