ballistic electrometer

例句：

1. 1. The ballisticsexpert analyzed the trajectory of the projectile.
   弹道学专家分析了弹丸的轨迹。
2. 2. The ballistics team was tasked with developing a new weapon system.
   弹道学团队被指派开发一种新的武器系统。
3. 3. Ballistics is a fieldthat studies the motion and behavior of projectiles in flight.
   弹道学是研究飞行中弹丸的运动和行为的领域。