concave
US /ˈkɑːn.keɪv/
UK /ˈkɑːn.keɪv/
1.
凹的, 凹面
having an outline or surface that curves inward like the interior of a circle or sphere
:
•
The spoon has a concave shape.
勺子是凹形的。
•
The lens of the telescope is concave.
望远镜的镜片是凹面的。
凹的, 凹面
having an outline or surface that curves inward like the interior of a circle or sphere