凹面的 meaning in English
a concave mirror
concave
Examples
- The bowling ball creates a deep indentation in the rubber sheet , and the slope of this indentation causes the marble to be deflected toward the larger ball , as if some force ? gravity ? were pulling it in that direction
保龄球会在弹性布料上造成一个很深的凹陷，而这个凹面的斜坡会使弹珠向大球滚动，就好像有股力量（重力）把它往那个方向拉。