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1. Oxford American Dictionary

   medical mask

   • n.
     a mask that covers the mouth and nose and acts as a barrier to the transmission of infectious agents, especially one intended for the use of medical personnel when interacting with patients

   • noun: medical mask, plural noun: medical masks

2. • 釋義

   n.

   名詞

   • 1. a mask that covers the mouth and nose and acts as a barrier to the transmission of infectious agents, especially one intended for the use of medical personnel when interacting with patients medical masks are in short supply at hospitals across the country