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(单词翻译:双击或拖选)
介绍:
smog 雾霾
mask 口罩、面膜
A mask is an object normally worn on the face, typically for protection, disguise(伪装), performance, or entertainment.
gas mask 防毒面
oxygen mask 氧气面罩
air purifier /?pj?r?fa??r/ 空气净化器
An air purifier is a device which removes pollution from the air in a room.
fire extinguisher 灭火器 /?k?st??ɡw???r/