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A respirator is designed to protect the person wearing the respirator against breathing in very small particle aerosols that may contain viruses. 呼吸器是為保護(hù)使用者的呼吸，防止吸入空氣中非常微小的顆粒物氣溶膠設(shè)計(jì)的，這些氣溶膠中就會(huì)包含有病原微生物。