concave

过去分词：

动词过去分词: concaved

更多词形：

副词: concavely | 名词: concaveness | 动词过去式: concaved | 动词过去分词: concaved | 动词现在分词: concaving | 动词第三人称单数: concaves |

单词例句：

These are aberration-corrected holographic concave gratings.

下表所列为像差校正全息凹面光栅。

Something having concave and convex edges terminating in points.

新月形物凹边和凹边汇合成点的物体

Concave on both surfaces; biconcave. Used of a lens.

双面均凹进的；双凹的。用于指透镜

Ovary ellipsoid to ovoid-globose, without concave nectaries.

球状子房椭圆形的到卵球形，没有凹陷蜜穴。

A large curtain or wall,usually concave,hung or placed at the rear of a stage.

半圆形天幕，透视背景巨大的幕布或围墙，通常为凹形，挂或放在舞台后面

Concave on both surfaces;biconcave.

双面均凹进的；

In adults its contour may be straight, slightly concave or slightly convex.

成人肺其形状可以是直的，轻微凹下或轻度突出。

The stone is concave on both the upper and lower surfaces.

冰壶石的上表面和下表面都是凹面。

Concave on one side and convex on the other.

一面凹进一面凸起的