On the other hand, temperature, volume and pressure are variables that are much easier in the lab to keep constant.

另一方面，温度，体积和压强,在实验室中比较容易保持恒定。

麻省理工公开课 - 热力学与动力学课程节选

All right? It's now something that I can search in constant time. And that's what's going to allow me to keep this thing as being log.

在固定的时间内搜索,这样就可以让时间复杂度保持在对数级,好的，考虑过了这些。

麻省理工公开课 - 计算机科学及编程导论课程节选