secondary-to-primary-turn ratio

例句：

1. 1.The car's steering wheel is designed to provide a secondary-to-primary turn ratio of 2:1.
   汽车的方向盘设计为提供2:1的次要到主要转向比。
2. 2. The new model has a higher secondary-to-primary turn ratio than the previous one.
   新款模型的次要到主要转向比比旧款高。
3. 3.The engineer adjusted the gear ratio to achieve a better secondary-to-primary turn ratio.
   工程师调整了齿轮比例，以获得更好的次要到主要转向比。