一辆汽车撞倒了一个路人、他伤的很严重的翻译：A man was knocked down by a car, he hurt his very serious 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

A car hit a passer, he's very serious injury

A man was knocked down by a car, he hurt his very serious

An automobile knocked down a passer-by, he has injuried very seriously

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A man was knocked down by a car, he hurt his very serious