That is, it gives us the relationship between energy and work and heat.

热力学第一定律阐述了,能量，功和热之间的关系。

麻省理工公开课 - 热力学与动力学课程节选

It might suggest that you could convert all the work to heat.

它暗示我们可以把所有的功转化为热,但是热力学第二定律说。

麻省理工公开课 - 热力学与动力学课程节选