coal mine的复数形式怎么拼写

She fancied she and Carrie were somewhere beside an old coal - mine.她梦见她和嘉莉不知站在哪个旧矿井的旁边.We decided to open out a coal mine near the city.我们决定在城市附近开发一煤矿.The men in the coal - mine were asphyxiated by the bad gas.煤矿坑里的工人们为...

coal mine的音标：coal mine的英式发音音标为：[kəul main]coal mine的美式发音音标为：[kol maɪn]...

n.煤矿，煤矿坑...