cement-sand ratio

例句：

1. 1.The construction company needs to maintain a cement-sand ratio of 1:3 for the concrete mix.
   建筑公司需要保持混凝土混合物的水泥砂比为1:3。
2. 2. The engineer calculated the cement-sand ratio based on the soil conditions and the desired strength of the concrete.
   工程师根据土壤条件和所需的混凝土强度计算了水泥砂比。
3. 3. To ensure the durability of the building, the architect adjusted the cement-sand ratio to reduce waterabsorption.
   为了确保建筑物的耐用性，建筑师调整了水泥砂比以减少吸水率。