phreatic low

例句：

1. 1. The phreatic low is a natural source of drinking water.
   泉水是天然的饮用水源。
2. 2. The spring is located in the mountains, providing fresh water for the villagers.
   这个泉位于山区，为村民们提供新鲜的水。
3. 3. The phreatic low has been used for centuries as a source of potable water.
   这个泉自古以来就被用作饮用水的来源。