Alcohol may be a medical disinfectant, but should not be relied upon to sterilize water.

酒精可能是医学上的消毒剂，但决不可用来消毒饮用水。

Thousands of years ago, Egyptians used it to sterilize drinking water. Ancient Romans, Aztecs and Greeks also used it for medical treatments.

几千年前，埃及人就会使用这种东西来给饮用水消毒。古罗马人、阿芝特克人和希腊人也用它来治病。

Fire, fire fire - Fire is your friend and essential for warmth, cooking, boiling and sterilizing water, and signaling for help with smoke.

火火 - 火是你的朋友， 对于取暖、 做饭、 火，煮沸和消毒水以及发出烟雾求救信号都是必不可少的。