Water plays a foundational part in human life and is a requisite of human circulative system, digestive system, respirometric system and urological system.

• 摘要水是人的生存基础，是人体循环系统、消化系统、呼吸系统、泌尿系统正常工作的必要物质保证、生命活动不可缺少的关键要素。