This is also an expression used to show a feeling like surprise or disappointment.

VOA: special.2010.02.07

Disappointment number two, once there is a legitimate government based on consent, the only limits for Locke are limits on arbitrary takings of life or of liberty or of property.

失望的第二点，一旦经过同意建立合法政府后，对洛克来说它唯一的限制,就是不能肆意夺取生命或自由或财产。

耶鲁公开课 - 公正课程节选

He says the mood at the conference today is one of disappointment.

VOA: standard.2009.11.06