• 干净的书桌

cleaness清洁度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 air manifold净化空气总管cleaning compounds清洁剂侵入cleaning operation清洗操作clean-up reactor气体吸收反应器cleaning with acid[机] 酸洗clean up committee清扫委员会clean producer gas净化发生炉煤气cleaning character清净性cleanliness degree洁净度cleaner-silencer清洁-消音器