beam balance ratio

例句：

1. 1.The beam balance ratio is an important factor in the design of bridges.
   梁的平衡比是桥梁设计中的一个重要因素。
2. 2.The beam balance ratio was used to calculate the load-bearing capacity of the beam.
   梁的平衡比被用来计算梁的承载能力。
3. 3. The beam balance ratio was determined by measuring the length and weight of the beam.
   梁的平衡比是通过测量梁的长度和重量来确定的。