"Not that it matters," said Trujillo indifferently.

“它倒不是那么重要”，特鲁希略漠然地说。

《柯林斯英汉双解大词典》

Not that it matters, but yes.

那并不重要，但，是的。

youdao

I wasn't able to speak to her before she left-not that it matters though, because I can phone her tonight.

我未能在她离开前同她谈话，但这并不重要，因为今晚还能给她打电话。

youdao

But in terms of what matters, it's the death of the person and that's star one,not star two.

但是谈到什么才是重要的，就应该是作为人的死亡，就是星号一不是星号二。

耶鲁公开课 - 死亡课程节选

The difference between the two is actually rooted in an academic theory of development (not that it matters).

ECONOMIST: American values: Living with a superpower | The

Sure -- not that it matters, because let's be honest, there isn't a chance in hell that's going to be happening any time soon.

ENGADGET: Motorola's cellphone business needs a new leader: okay, I'm in.

Not that it matters much: in the frenzied world of the Internet, many investors seem convinced that the bigger a new company's losses, the bigger its potential.

ECONOMIST: Internet investing