區別就是兩者都是合成詞+water的短語，具體的不同如下
spring water中文意思是泉水
It is a kind of hot spring water， which contains the mineral base， to restore and transform it into weak alkaline water.
pure water中文意思是[化學] 純水，淨水純淨水
The bottle is sealed， and the label says "pure water".
