n.精煤(=clean coal)
v.打扫,清扫(动词clean的第三人称单数)
A person who cleans and polishes shoes for a living. 擦鞋匠以擦鞋和上光鞋为生的人
The filter cleans the fuel before it enters the engine. 在燃料进入发动机之前,过滤器先把它过滤。
A power-operated harvesting machine that cuts, threshes, and cleans grain. 联合收割机一种动力操作切割、脱粒和打场的收割机器
v.使 ... 清洁;净化;使 ... 纯洁
n.洁肤液;清洁剂;清洁工
v.使 ... 清洁;净化;使 ... 纯洁
v.使 ... 清洁;净化;使 ... 纯洁