Not a few months, the situation suddenly happen earth-shaking change.

可没过几个月，形势突然就发生了天翻地覆的变化。

youdao

Accidents happen so suddenly.

事故的发生都很突然。

youdao

Being rich wouldn't be bad either, but that won't happen unless an unknown relative dies suddenly in some distant land, leaving me millions of dollars.

有钱不是什么坏事，但这种情况不会发生在我身上，除非一个不知名的亲戚突然在某个遥远的国度去世了，给我留下了数百万美元的遗产。

youdao

Slow earthquakes are different from violent earthquakes, which happen suddenly and can be extremely destructive.

VOA: special.2009.07.07

Just a couple of months ago London seemed to be soaring and now suddenly there's this pessimistic atmosphere because we don't know what's going to happen in London.

仅仅数月之前,伦敦房价还一路高歌,忽然之间市场一片愁云惨淡,我们不知道伦敦的未来状况

耶鲁公开课 - 金融市场课程节选

If something were to suddenly happen to you, or to one of your key managers, is there a plan in place to deal with it?

FORBES: Take This Cue From Warren Buffett

The city state's transport system would benefit from being better able to match the demand and supply of taxis, particularly when it rains, which tends to happen suddenly in Singapore.

ECONOMIST: Urban research

Cholera outbreaks, such as the one that hit Peru and its neighbours in the early 1990s, tend to happen suddenly, as the formerly benign bacteria turn on their pathogenic apparatus when they hit the body.

ECONOMIST: The cholera genome