Lunar concavity

英 美
  • 月球坑
  • concavity n.中央凹陷;凹洼;凹状
  • lunar adj.月亮的;阴历的;银的
    1. Many scientists believe that Lunar craters were formed by the collision of meteors and comets against the moon.
      许多科学家相信,月球坑穴是流星和彗星碰撞月球所造成的。