If you were reading a book in your warm bed on a cold winter's day,you might say you were snug as a bug in a rug.

VOA: special.2010.12.26

The cold virus has evolved just as much as you evolved.

病毒也在进化像你一样。

耶鲁公开课 - 心理学导论课程节选

From this point of view then, the reason why you sneeze when you have a cold is that your cold the cold virus is using your body as a tool to replicate itself.

从这个角度看，感冒时打喷嚏是因为,感冒病毒用你的身体繁衍后代。

耶鲁公开课 - 心理学导论课程节选

If you were reading a book in your warm bed on a cold winter's day, you might say you were snug as a bug in a rug.

VOA: special.2009.06.28