traction transformer of Scott connection

例句：

1. 1.The car's traction is poor on the wet road.
   这辆车在湿滑的路面上牵引力不足。
2. 2. The train has a high traction motor.
   火车有一个高牵引力的电机。
3. 3. The heavy load required more traction to move it.
   重载需要更多的牵引力来移动。