中英释义：
重点词汇
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垂危
critically ill; on the verge of death; in a critical condition; at death's door; terminally ill
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病人
patient; sick; the sick man; case; weak; sick person; invalid
垂危
critically ill; on the verge of death; in a critical condition; at death's door; terminally ill
病人
patient; sick; the sick man; case; weak; sick person; invalid