精煤已清选的煤clean: adj. 1.清洁的,干净的;未染污的;(核武器等)无放 ...coal: n. 1.煤,煤块,煤堆。 2.〔pl.〕〔美国〕(一堆 ...dry-cleaned coal: 干选煤be cleaned in this way: 被冲洗be cleaned out: 把钱花光; 输光下载手机词典可随时随地查词查翻译