Their cost is low. They are not difficult to operate.

VOA: special.2009.09.29

It only helps them to bring down the cost of health care, government has to operate the system more efficiently than the market does.

它只能,降低医疗的费用，政府必须,比市场更加有效地运作。

斯坦福公开课 - 经济学课程节选

The towers cost $2,200 to set up, but very little to operate.

VOA: standard.2010.05.25