mean load density

例句：

1. 1.The engineer calculated the mean load density of the bridge to ensure its safety.
   工程师计算了桥梁的平均载荷密度，以确保其安全。
2. 2. The mean load density of the cargo is critical for determining the weight of the shipment.
   货物的平均载荷密度对于确定货物的重量至关重要。
3. 3.The mean load density of the vehicle is crucial in calculating fuel efficiency.
   车辆的平均载荷密度在计算燃油效率时至关重要。