fresh water是可数名词吗

Don't forget that all dogs need a supply of fresh water to drink

不要忘记所有的狗都需要喝干净的水。

Fresh water freezes at 0 ℃.

淡水在摄氏零度结冰。

Salt water freezes at a lower temperature than fresh water.

盐水冰点温度比淡水冰点温度低。