The swimmer's arm was bitten off by a shark.

游泳者的手臂被鲨鱼咬掉了。

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While shark attacks are not uncommon around Australia's vast coastline, Taronga Zoo shark attack expert John West told ABC no-one had been bitten by a shark in Sydney Harbour since the late 1990s.

澳洲有着漫长的海岸线上，鲨鱼袭人事件并不罕见，但是从上世纪90年代末开始，悉尼港再未发生过鲨鱼袭人事件。

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American Idol host, Emmy nominee, and Emmy co-host Ryan Seacrest was bitten by a shark over the weekend.

《美国偶像》的主持人、艾美奖提名人选及艾美奖主持瑞安·西克莱斯特上周末被鲨鱼咬了。

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"The body behaves as if it's been bitten by a shark, and yet there's no shark bite, " Yun says.

FORBES: Rethinking Biology