鸡窝里飞出金凤凰: phoenixes soaring out of [hatched in] a chicken coop -- sophisticated products can be made in makeshift factories.; a miracle appears where no miracle seems possible
煤: 名词(黑色固体矿物) coal 短语和例子采煤 cut [mine] coal; 烟煤 soft coal; 无烟煤 hard coal; 粉煤 fine coal; 块煤 lump coal
