egg coal

例句：

1. 1. Thefarmer used to use eggs and coal toheat his house.
   这位农民过去用鸡蛋和煤炭来加热他的房屋。
2. 2. The coal mineis located in the northwest of thecountry.
   煤矿位于该国西北部。
3. 3. The coalmine has been closed dueto safety concerns.
   由于安全担忧，煤矿已经关闭。