clean bill of health

【字面理解】干净的健康凭单

【英文解析】an assurance that someone is healthy or something is in good condition

【中文解析】健康证明;合格证明

【典型例句】① He’s been given a clean bill of health by the doctor.度生给他开了一个健康证明。

②Of 30 countries inspected for airline safety，only 17 received a clean bill of health.在接受航*空安全检查的 30个国家中，仅有I7个国家收到了合格证明。

【注释】源于Bill of Health,即船在离港时要拿到的文件， 以证明在离开时出发地点没有发生任何疫情。