dirtish有点脏的dirtn.污垢；泥土；灰尘dirt repellent finish拒污整理,防污整理dirt dispersion agent阻垢分散剂Dirt breeds disease.污秽导致疾病丛生。dirt thickness gauging垢厚测量dirt-extraction gear选煤机dirt filtrating screen滤尘网Dirt harbors vermin.污物藏害虫。Dirt harbours germs.污垢中藏有病菌.dirt-excluding groove积垢槽,出渣槽dirt thermal resistance污垢热阻