"People tend to congregate and be together and the way the common cold virus is transmitted from one person to another is through handshakes,through sneezing, or coughing on one another."

VOA: special.2011.04.20

the zeroth law, which is the common-sense law, which says that if you take a hot object next to a cold object, heat will flow from the hot to the cold in a way that is well defined, and it allows you to define temperature.

上节课我们讨论了，热力学第零定律,这一定律源自常识：如果把一个热的物体,与一个冷的物体挨在一起，热量就会以确定的方式。

麻省理工公开课 - 热力学与动力学课程节选

Hundreds of thousands of people used to get polio, a virus that spreads as easily as the common cold.

VOA: standard.2010.08.02

Stomach cancer has become more common in some areas where food is often not stored in a cold place.

VOA: special.2009.01.13