ratio of grinding media to material

例句：

1. 1. The ratio of sand to water in the concrete mix is crucial for its strength.
   混凝土混合物中沙与水的比例对其强度至关重要。
2. 2. The ratio of sugar to water in this recipe is just right for baking a cake.
   这个食谱中糖与水的配比非常适合烘焙蛋糕。
3. 3. The engineer carefully calculated the ratio of materials needed for the project.
   工程师仔细计算了项目所需的材料比例。