褐煤阶段brown coal: 褐煤。 stage: n. 1.讲台；舞台；戏院，剧场；〔the stage〕 ...bituminous brown coal: 沥青煤brown coal (or lignite ): 褐煤brown coal (or lignite): 褐煤下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:brown coal stage，即可在微信中查询翻译
