Professor Walker says this reduces home operating expenses.

VOA: special.2009.10.05

When you're running a site and you're four people, are on the kitchen table, your operating expenses are relatively low.

当你运营一个网站，你们四人围坐在餐桌旁工作，由于运营费用较低。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

You might see them on the site and we just keep our operating expenses low so far and by doing that, we've been able to stay cash flow positive for basically the entire existence of the company.

在网站上可以看到,我们一直保持低成本运营，这样可以使得现金流的流入大于流出,自公司创办以来都是这样做的。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选