名词
中文翻译：医疗证明书
同义词：
['health certificate', 'medical record', 'health certificate']
例句：
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1. To travel abroad, you need a valid medical certificate.
出国旅行需要有效的医疗证明。
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2. The doctor issued her with a medical certificate to prove her health condition.
医生给她颁发了医疗证明，以证明她的健康状况。
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3. The patient was required to provide a medical certificate before undergoing surgery.
患者在手术前需要提供医疗证明。