oxygen mask
noun /ˈɒksɪdʒən mɑːsk/
  /ˈɑːksɪdʒən mæsk/
 - a device placed over the nose and mouth through which a person can breathe oxygen, for example in an aircraft or a hospitalTopics Transport by airc1, Medicinec1
 
| 单词 | oxygen mask | 
| 释义 | oxygen masknoun /ˈɒksɪdʒən mɑːsk/   /ˈɑːksɪdʒən mæsk/  
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