常見例句雙語例句The paper reported the epidemiological results of 22-year follow-up study of workers exposed to dust at bituminous coal mines.本文報道了煙煤煤礦井下工人22年追蹤觀察的職業(yè)流行病學調(diào)查研究結(jié)果。 返回 bituminous coal dust