Strokes, which occur when blood flow to the brain is blocked, can kill brain tissue and are one of the worldwide leading causes of death and permanent disability.

发生在脑部血流阻断时的卒中可能杀伤脑组织，并且在世界范围内都是死亡和永久性致残的主要原因之一。

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Gas explosions occur often in some recent years, gas explosions kill mine workers, and make much economic damage.

最近几年瓦斯事故发生频繁，瓦斯爆炸夺走了许多矿井工人的生命，给国家造成了重大经济损失。

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Roughly 85 per cent of MRSA cases, which is treatable only with a few antibiotics, occur in hospitals, where infection can kill weakened patients.

大体来讲，发生在医院内的大约85%的MRSA病例，只能接受一小部分抗生素的治疗，并且能够使本已衰弱的病人死亡。

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The 125-child study was designed to show that ProBugs would reduce the diarrhea that can occur from antibiotics, which kill off natural helpful bacteria in the gut.

FORBES: The Yogurt Cure

If they occur in sufficiently high concentrations, they can kill a cell.

ECONOMIST: Trojan DNA

It doesn't even occur to a parent that their child could threaten to kill or beat the victim for coming forward.

CNN: How do you talk to your son about rape?