基本解释无污染的同根派生 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.呼吸防护口罩只能在无污染的环境中，包括无确诊或疑似流感病人的环境中摘除。pollution-free更多例句