cleansn.精煤（=clean coal）v.打扫，清扫（动词clean的第三人称单数）cleanadj.干净的；纯洁的；完全的；空白的；正当的；精准的adv.完全地n.清洁v.打扫；清扫；擦，刷clean booth清洁台clean dress干净的外衣cleaner bag除尘器袋cleaned gas净化气体clean stock清货clean steel纯净钢,洁净钢clean slaten.清白历史cleaner rod除草杆,清洁器杆clean start发射准备完毕clean shoot干净利索的投篮