ratio of roll gears

例句：

1. 1. The engineer calculated the ratio of roll gears to determine the optimal setting for the machine.
   工程师计算了滚动齿轮的比例，以确定机器的最佳设置。
2. 2. The new design uses a higher ratio of roll gears to improve efficiency.
   新设计使用了更高的滚动齿轮比例来提高效率。
3. 3. The gearbox's ratio of roll gears is critical for smooth operation.
   齿轮箱的滚动齿轮比例对于平稳运行至关重要。