目前，煤是蒸汽动力厂的最常用的能源。

At present coal is the most common food of a steam plant.

youdao

煤便宜的地方，蒸汽动力就经济。

Where coal is cheap, steam power may be economical.

youdao

煤便宜的地方，蒸汽动力就经济。

Where coal is cheap, steam power may be economical.

youdao