The surgeon took off his cap and surgical mask? disclosing a young and smart face.

外科医生除去手术帽和口罩,露出了一张年轻帅气的脸.

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Objective: To a bio - aerosol test and estimate technical system to evaluate the efficiency of surgical mask.

目的: 为评价医用外科口罩性能的优劣而建立医用外科口罩的生物气溶胶防护效果的测试方法.

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Kidney disease. A sweet ammonia smell a person's breath, detectable even a dentist's surgical mask.

肾的问题. 病人的呼吸会有一种甜氨水味, 就算牙医带着手术面罩也能闻见.

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Wearing a surgical mask may be appropriate to prevent transmission to others and yourself.

戴上口罩,避免将病毒传染.

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