Definition: a hard, black substance that is dug from under the ground and burned as fuel Level: C1
壁炉里堆满了煤块。
The fireplace was stocked with lumps of ___coal.
开采金、煤或石油是我们经济的一个选择。
Mining for gold, ___coal, or oil is an option for our economy.
许多发电厂仍然依靠燃烧煤来发电。
Many power plants still rely on burning ___coal to generate electricity.
