concave
01
凹的, 向内弯曲的
having a surface that is curved inward
例子
The concave mirror focused the light into a single point, making it perfect for starting a fire.
凹面镜将光线聚焦到一个点，使其成为生火的完美工具。
The concave shape of the bowl made it ideal for holding soup or cereal.
碗的凹面形状使其非常适合盛放汤或麦片。
词汇树
biconcave
concavely
concaveness
concave
