它以强大的通行能力，快捷的运行速度，灵活的运行方式等运输特性极大地提高和丰富了运输的能力和内容。

It has powerful pass ability, high speed, and flexible advantage, which greatly improve and abundant the ability and content of communication.

youdao

它以强大的通行能力，快捷的运行速度，灵活的运行方式等运输特性极大地提高和丰富了运输的能力和内容。

It has powerful pass ability, high speed, and flexible advantage, which greatly improve and abundant the ability and content of communication.

youdao