A fire broke out in his house, a really unexpected disaster.

他家发生了火灾，这真是飞灾横祸啊。

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In 1993, however, an unexpected disaster struck him and changed his innocent childhood life since then.

然而，1993年的冬天，一场突如其来的灾难打破了他无忧无虑的童年。

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Faced with the unexpected disaster, my classmates and I spared no effort to help the people in stricken area.

面对这突如其来的灾难，我的同学和我都不遗余力地帮助灾区的人民。

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Though most young entrepreneurs would rather have a root canal than consult an attorney, nothing will put you on the path to startup disaster quite like an unexpected lawsuit, nasty contract dispute, or even a friendly competitor stealing your idea.

FORBES: Seven Legal Hiccups That Can Crush Your Startup