热水袋不能灌沸水，你知道吧？皮肤在44摄氏度就能烫伤，在80摄氏度马上就烫坏了。

A burn is damage to your skin caused by a temperature as low as 44 degrees Celsius (109.4 Fahrenheit) for a long time. A high temperature (more than 80 degrees Celsius) can cause more severe burns in a very short period of time (less than a second).

http://burncentrecare.co.uk/about_burned_skin.html