Well, there you can see it. Sure better have gotten small because in fact it has to be zero.

这一项很小是很好的,因为实际上必须是零。

麻省理工公开课 - 热力学与动力学课程节选

In other words, T surrounding dS has to be greater than zero, and of course temperature is always positive.

换句话说这就意味着，环境温度T乘以dS必须大于零，当然环境温度T是正的。

麻省理工公开课 - 热力学与动力学课程节选