1.The Marshalling Station is a key crunode of the railway network, its work is fulfilled by multitype workers of different departments.

1.编组站是铁路运上的关键结点，其作是由不同部门、联合劳动、共同协作完成的。

2.The Marshalling Station is a key crunode of the railway network whose work is fulfilled by multitype workers of different departments .

2.编组站是铁路运上的关键节点,其作是由不同部门、联合劳动、共同协作完成的。