基本解释無汙染的同根派生 pollution-free相关词英汉例句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.呼吸防護口罩衹能在無汙染的環境中，包括無確診或疑似流感病人的環境中摘除。pollution-free更多例句