concrete proportioning

例句：

1. 1. The engineers are working on a new concrete proportioning system for the construction project.
   工程师们正在为这个建筑项目开发一种新的混凝土配比系统。
2. 2. The architect decided to use a different concrete proportioning to achieve a more balanced structure.
   建筑师决定使用不同的混凝土配比来实现更均衡的结构。
3. 3. The construction company is required to follow the latest standards for concrete proportioning to ensure safety and quality.
   建筑公司被要求遵循最新的混凝土配比标准，以确保安全和质量。