He suffered severe brain damage after a motorbike accident.

摩托车祸后他的脑部严重受损。

《柯林斯英汉双解大词典》

Four of them died and seven suffered severe brain damage.

其中4人死亡，7人发生严重的大脑损伤。

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The syndrome is often misdiagnosed as coma and severe brain damage.

这种症状经常被误诊为昏迷和严重脑损伤。

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Otherwise, the pressure in her cranium would have caused severe brain damage, likely killing her.

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Patients in a vegetative state are awake, not in a coma, but have no awareness because of severe brain damage.

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But if the affected person has suffered severe brain damage, he or she may sustain permanent disabilities or may never regain consciousness.

CNN: Coma