Nu Wa Mends the sky: long, long ago, half of the sky suddenly collapsed and a huge hole appeared.

《女娲补天》讲的是：远古时候，天空突然塌下半边，出现了一个大洞，大地上洪水泛滥，猛兽横行，人类面临巨大的灾难。

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Then, in 1992, the cod population of the Grand Banks suddenly collapsed, throwing 40,000 people out of work.

后来，92年时，大浅滩的鳕鱼数量突然下降，使4万人丢掉了工作。

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Nobody agrees why the Mayans' astonishingly advanced civilisation suddenly collapsed between 750 and 850.

玛雅人有着惊人发达的文明，至于它在公元750至850年间为什么瓦解，人们还没达成共识。

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History is littered with once-dominant institutions that were imperceptibly hollowed out and then suddenly collapsed.

ECONOMIST: Political parties: Lonely at the top | The

The illusion of stability was shattered in April last year when Nissan Mutual Life Insurance Co. suddenly collapsed.

FORBES: Here come the gaijin

An 18-person crew had been working on the Interstate 35W span when it suddenly collapsed during the evening rush hour.

NPR: Officials Warn of Possible Flaw in Nation's Bridges