Can I drink raw water?

Under normal circumstances, raw water can't be drunk, because it contains all kinds of harmful bacteria, which will cause some harm to people's stomach. The internal structure of fish and flowers is different from ours. For example, bicycles are lubricated with gasoline, motorcycles with ordinary cheap lubricating oil, automobiles with advanced lubricating oil, and airplanes with special lubricating oil! People are advanced animals, so people's needs in life should be higher than other creatures! Therefore, people who are born with water can't drink it casually, just like airplanes can't be lubricated with car lubricant!