他在一次撞车事故中头部受伤，要是还能存活下来，他们的余生一定是个植物人。 If he had survived the head injuries he got in the crash, he would have been a vegetable for the rest of his life.
自从事故中脑子受损坏後，她成了植物人。 Since she suffered brain damage in the accident she's been a vegetable.
他因脑部重伤而成了植物人。 Severe brain damage turned him into a vegetable.
