淬火过程中表面换热系数是反映界面能量传递和介质冷却能力的重要物理参数。

Surface heat transfer coefficient is an important physical parameter which reflects energy transfer of interface and cooling capability of medium.

youdao

All right, so I'm burning some energy, I'm burning some fuel to do this somehow, to get that work to happen.

而这个路径需要先加热再冷却，这样，我需要能量来源，比如燃料，来完成做功。

麻省理工公开课 - 热力学与动力学课程节选