cannon projectile

• 加农炮弹

cannon projectile的用法和样例：

例句

1. Like musket balls and cannon balls dropped from the Tower, the Earth and Moon are made of a different mix of elements, and they have different masses.
   就象从塔上扔下的滑膛枪弹和加农炮弹一样，地球和月球是由不同元素混合而成的，它们有不同的质量。