“蒸汽机”的英语表达是 steam engine。
“steam”意为“蒸汽” ,“engine”指“发动机;引擎” ,二者组合起来就是“蒸汽机” 。例如:The steam engine revolutionized transportation and industry.(蒸汽机给交通和工业带来了革命性的变化 。)