1. The steam engine was a revolutionary source of motive power in the 19th century.
在19世纪，蒸汽机是一种革命性的动力来源。

2. The human body relies on food as its primary motive power.
人体依靠食物作为其主要的动力。

3. The motive power behind her decision to quit her job was the desire for more time with her family.
她决定辞职的动力是为了更多的时间和家人在一起。

4. The locomotive's motive power comes from its diesel engine.
火车头的动力来自其柴油发动机。

5. The country's economy is driven by the motive power of its manufacturing sector.
这个国家的经济是由其制造业的动力推动的。

6. Renewable energy sources are becoming increasingly popular as a sustainable motive power alternative.
可再生能源作为可持续的动力替代品越来越受欢迎。