pollution-free

常見(jiàn)例句

• Respirators should only be removed when the wearer is in an area that is considered free of airborne hazards, including confirmed or suspected influenza patients.
  呼吸防護(hù)口罩只能在無(wú)污染的環(huán)境中，包括無(wú)確診或疑似流感病人的環(huán)境中摘除。
返回 pollution-free