main haulage level

例句：

1. 1. The main haulage levelof the company is high.
   该公司的主要货运水平很高。
2. 2. Main haulage level is akey factor in determining the success of aproject.
   主要货运水平是决定项目成功的关键因素。
3. 3. The main haulage level hasbeen improved significantly since the implementation of newpolicies.
   自实施新政策以来，主要货运水平已显著提高。