projectile energy

例句：

1. 1.The projectile energy is released when thebullet hits the target.
   当子弹击中目标时释放了投射能量。
2. 2. Thekinetic energy of theprojectile is converted into heatas it travels through the air.
   投射物在空气中飞行时，其动能转化为热能。
3. 3. The projectile energyis used to propel the spacecraftforward in space.
   投射能量用于推动太空船在太空中前进。