常見(jiàn)例句雙語(yǔ)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(bào)道了菸煤煤鑛井下工人22年追蹤觀察的職業(yè)流行病學(xué)調(diào)查研究結(jié)果。 返回 bituminous coal dust