Who invented the steam engine?

谁发明了蒸汽机？

In 1941, the train would have been pulled by a steam engine.

1941年，火车可能已由蒸汽机车来牵引了。

James Watt's steam engine in 1765.

1765年詹姆斯·瓦特的高效蒸汽机。

Encounter ra steam engine.

迎战蒸汽引擎。

Who invented steam engine?

谁发明的蒸汽机？