n.<医>昏迷,怠惰，麻木,<天>（彗星的）彗发
She had slipped into a coma by the time she reached hospital.
到医院时，她已陷入昏迷。
He is in a coma and on a life-support machine.
他处于昏迷中，靠呼吸机维持生命。
That night he sank into a deep coma.
那晚他陷入了深度昏迷。