accelerator rod

例句：

1. 1. The acceleratorrod is used to accelerate the projectile.
   加速器杆用于加速弹丸。
2. 2. The accelerator rod was designed to improve theaccuracy of the measurement.
   加速器杆被设计用来提高测量的准确性。
3. 3. The acceleratorrod was responsible for controlling the speed ofthe projectile.
   加速器杆负责控制弹丸的速度。