名词
中文翻译：值班医生
同义词：
['on-call doctor', 'emergency room physician']
例句：
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1.The attending doctor was very helpful during the surgery.
手术期间，值班医生非常有帮助。
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2.He asked for an on-call doctor to come and help him with his injuries.
他请求一个值班医生来帮助他治疗他的伤口。
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3. She went to the emergency room because she had a sudden headache.
她去了急诊室，因为她突然头痛。