symmetric block design

例句：

1. 1.The symmetric block design of the bridge helps to reduce the weight and increase stability.
   这座桥的对称块设计有助于减轻重量并增加稳定性。
2. 2. The engineer used a symmetric block design to optimize the load distribution.
   工程师使用对称块设计来优化负载分布。
3. 3.The symmetric block design is an effective way to prevent water leakage in the construction site.
   对称块设计是防止施工现场漏水的有效方法。