concave

形容詞

1. 1

   凹的、凹面的

   A concave lens makes distant objects look smaller.

   凹透鏡會讓遠處的物體看起來變小。

2. 2

   凹陷的、塌陷的

   Years of illness had left his cheeks concave.

   多年的病痛讓他的雙頰凹陷。