什么是 projectile？
什么是 projectile？
- A fired, thrown, or otherwise propelled object, such as a bullet, having no capacity for self-propulsion.
- A self-propelled missile, such as a rocket.
- Capable of being impelled or hurled forward.
- Driving forward; impelling: a projectile force.
- Zoology Capable of being thrust outward; protrusile.