water-use ratio

• 用水比

water-use ratio的用法和样例：

例句

1. Salt water has more buoyance than fresh water.
   咸水比淡水浮力大。
2. The water pumped from wells is much cleaner than that pumped from rivers.
   从井里抽出来的水比从河里抽上来的水清洁得多。