fresh water是可數名詞嗎

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

不要忘記所有的狗都需要喝乾淨的水。

Fresh water freezes at 0 ℃.

淡水在攝氏零度結冰。

Salt water freezes at a lower temperature than fresh water.

鹽水冰點温度比淡水冰點温度低。