These views have not gone unchallenged.

这些观点并非没有受到过质疑。

《柯林斯英汉双解大词典》

Such scandals have not, alas, been absent.

唉，这样的丑闻也不是没有。

《柯林斯英汉双解大词典》

There are few who have not suffered.

几乎无人免于受难。

《柯林斯英汉双解大词典》

Up to now Syrian government forces have not tried to interfere with the US-led air campaign.

BBC: Diplomatic correspondent

The changes have worked well and have not compromised the safe operation of trains.

BBC: Southeastern train staff to be balloted over strikes

Many experts say mental health services in the region have not recovered since Hurricane Katrina.

NPR: Mental Issues Surge, Suicide Rates Flat Post-Katrina