她还没写信来—倒不是她说过她要写。

She hasn't written—not that she said she would.

《牛津词典》

“它倒不是那么重要”，特鲁希略漠然地说。

"Not that it matters," said Trujillo indifferently.

《柯林斯英汉双解大词典》

倒不是要你提醒我。

Not that you remind me of it.

youdao

Maybe I made a big mistake by likening it to an organic chemistry course-- I don't mean to turn you off.

也许将其比作有机化学课,是个错误,我不是故意想倒你们胃口的

耶鲁公开课 - 金融市场课程节选

This is kind of... it's like, it wasn't really a hard assignment.

这有点……其实倒不是真的很难。

考试考砸了怎么办 - SpeakingMax英语口语达人

So here we're talking about how food comes to the table. what happens just materializing it into fish sticks. We didn't just go out to the river and poured out the fish sticks.

因此在这我们将探讨食物的制作过程,什么让鱼变成冻鱼条,并不是可以去河里,把冻鱼条直接倒出来。

麻省理工公开课 - 媒体、教育、市场课程节选