There was no state-to-state highway system.

VOA: special.2010.01.11

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

The system was produced by the state-owned Rafael Arms Development Authority and is partially financed by the United States.

VOA: standard.2010.07.20

Germany's state-regulated, public universal health care system dates back to the late 1800s.

VOA: standard.2009.09.28