Now you mention it again, I do remember.

既然你又提起此事，我倒回想起来了。

youdao

And now you mention it, I wanted to talk to you about that.

既然你提到了这一点，我一直想跟你好好谈谈。

youdao

Now that you mention it , she did seem to be in a strange mood.

既然你说到这事儿，她确实好像情绪不大对。

《牛津词典》

Now, when you work with components, Ax and Ay, if I didn't mention it, they are the components of the vector, you can do all your bookkeeping in terms of Ax and Ay.

当你们在计算分量 Ax 和 Ay 的时候,即使我没有说明,你们也要记得它们是矢量的分量,你们可以都用 Ax 和 Ay 的形式来表示

耶鲁公开课 - 基础物理课程节选

Well, now that you mention it, mocking politicians does help our national mood.

FORBES: More Elected Representatives Doing Actual Harm