1、Where coal is cheap, steam power may be economical.
煤便宜的地方，蒸汽動力就經(jīng)濟。

2、Steam power and iron combined to revolutionize transport, which in turn had further implications.
蒸汽動力和鐵的結(jié)合使運輸發(fā)生了革命性的變化，更加產(chǎn)生了更深遠(yuǎn)的影響。

3、Then steam power entered the scene, putting the whole future of waterpower in doubt.
隨后，蒸汽動力登上了歷史舞臺，讓整個水力發(fā)電的前景一度遭到了懷疑。

4、Condenser system is the main part of steam power device.
冷凝器系統(tǒng)是蒸汽動力裝置的主要組成部分。

steam power翻譯