Much harder,of course, is changing a system that let companies take the risks that led to the current financial crisis.

VOA: special.2009.03.20

So, these on-changing properties that describe the state of the equilibrium state of the system are called state variables.

这些描述,系统平衡态的,变化的属性,就叫做状态变量。

麻省理工公开课 - 热力学与动力学课程节选

These are physical knobs that are available us as experimentalists. And so when we turn these knobs on our system, we want to know how the enthalpy is changing for that system.

这些都是我们做实验可,以得到的物理变量,所以当我们在系统中,改变这些量的时候。

麻省理工公开课 - 热力学与动力学课程节选

Mr.Orban adds that his government faces the task of "changing the constitution, saving the health care system, restoring public order and putting the economy back onto its feet."

VOA: standard.2010.05.29

to say 'get real.' What is dangerous is to commit "This is extraordinary, to spend a whole lot of money that we might not have on a system that most certainly won't help when the world is changing, when we're facing new threats, where now more and more military experts are saying there are different alternatives."

VOA: standard.2010.04.30