In order to solve this problem, we must study how to build model for high-speed train group during operation.

为解决这个问题，必须要研究如何对高速列车群运行过程建立模型。

youdao

In order to solve this problem, we must study how to build model for high-speed train group during operation.

为解决这个问题，必须要研究如何对高速列车群运行过程建立模型。

youdao