Geothmal well water

• 地下井水

Geothmal well water的用法和样例：

例句

1. While it is colorless when pumped up from the well, the water turns a startling shade of dark purple when teabags are added.
   刚打上来的地下井水本来是透明无色，加入茶包一泡，一转眼水居然变成了深紫色。