sand toughness number

例句：

1. 1.The engineer measured the sand's toughness number to determine its strength.
   工程师测量了沙子的强度数以确定其强度。
2. 2.The construction crew used this sand toughness number to calculate the amount of sand needed for the project.
   施工队使用这个沙的强度数来计算项目所需的沙子量。
3. 3.The sand toughness number is an important factor in determining the durability of a building's foundation.
   沙的强度数是决定建筑物地基耐用性的一个重要因素。