By heat engine people mean an engine converting heat energy into mechanical work.

热机是指把热能转变为机械功的一种发动机。

youdao

And we had the similar statement by Kelvin about the heat engine that required that some heat gets dumped into a cold reservoir in the process of converting the heat from the hot reservoir into work.

相同的陈述，同样的有开尔文表述：，把热量完全从高温热源，转移至低温热源的过程中，必然有功的输出。

youdao

And we had the similar statement by Kelvin about the heat engine that required that some heat gets dumped into a cold reservoir in the process of converting the heat from the hot reservoir into work.

相同的陈述,同样的有开尔文表述：,把热量完全从高温热源,转移至低温热源的过程中,必然有功的输出。

麻省理工公开课 - 热力学与动力学课程节选