单词：progressive ratio
progressive ratio的用法和样例：
例句
- The low tension and gentle treatment is also ensured by the ratio metered AC drive.其速比控制的交流传动系统也确保了低张力和轻柔处理。
- In view of the response lag in CVT ratio control, a control algorithm is proposed for compensating the response lag in proportional pressure reducing valve control.针对系统固有的速比控制滞后，提出了能够补偿滞后的控制算法来对比例减压阀进行控制。
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