extent of mechanization in loading and unloading

例句：

1. 1.The extent of mechanization in loading and unloading is a crucial factor in determining the efficiency of the transportation system.
   装卸机械的机械化程度是决定运输系统效率的关键因素。
2. 2. The increasing use of mechanization in loading and unloading has led to significant improvements in logistics operations.
   装卸机械使用的增加已经导致物流操作的显著改进。
3. 3. The extent of mechanization in loading and unloading plays a vital role in reducing labor costs and enhancing productivity.
   装卸机械的机械化程度在减少劳动力成本和提高生产力方面起着至关重要的作用。