It all brought back memories of a not very edifying past.

所有这些都让人回想起一段不是很令人愉快的过去。

《柯林斯英汉双解大词典》

The problem is that the compound has mixed effects in the brain, a not unusual occurrence with psychoactive drugs.

问题在于，这种化合物对大脑有混合作用，这种情况在服用精神药物时并不少见。

youdao

We have spent a not inconsiderable amount of money on the project already.

我们已经在这一项目上投入了一笔相当大的资金。

《牛津词典》

As a defender, he does not score a lot of goals- although he does have two in his career.

VOA: special.2010.06.02

And his father was a democrat but not a Bolshevik; so, he was anti-czarist, but he was not a Bolshevik.

他的父亲是民主党人而非布尔什维克党人;,他反对沙皇，但他并不是布尔什维克党人。

耶鲁公开课 - 1945年后的美国小说课程节选

A pure investment bank is not a depository institution and it's also--a pure investment bank is not a broker- dealer either.

一个真正的投行不是一个储蓄机构,当然一个真正的投行也不是证券公司-,或者发行公司。

耶鲁公开课 - 金融市场课程节选

And we do that here, but not on such a -- not as often as we had the opportunity in Austin.

CNN: Laura Bush on her first six months in the White House

When I decided to break away from my cubicle-bound life, I was 23 years old, the daughter of a protective family in India and had graduated from university in Singapore only two years earlier with a not-so-helpful Economics degree and a not-so-comforting amount of student debt.

BBC: How I quit my job to travel: The social media addict

So this is not a -- this is not a deepwater facility.

WHITEHOUSE: Press Briefing