narrow hook rule

例句：

1. 1. The narrow-hook rule is a common method for determining the optimal size of an object's cross-section.
   窄钩规则是一种常见的确定物体横截面最优尺寸的方法。
2. 2.In this case, the narrow-hook rule was used to determine the optimal design for the new bridge.
   在这种情况下，窄钩规则被用来确定新桥梁的最佳设计。
3. 3. The engineer applied the narrow-hook rule to optimize the structural design of the building.
   工程师应用了窄钩规则来优化建筑物的结构设计。