1.
a fixed reference point on the concave side of a conic section.
圆锥截面凹面的固定参考点。
2.
Convex on one side and concave on the other.
凸凹的一面凸一面凹的
3.
A depression similar to that in a shallow concave container for food.
凹形，凹面与浅的凹型盛食物的容器相似的凹处
4.
biconcave:Concave on both sides or surfaces.
两面凹的:两侧或两面凹陷的。
5.
Concave on one side and convex on the other.
一面凹进一面凸起的
6.
A slight depression or indentation in a surface.
凹痕表面上轻微的下陷或凹陷
7.
An indented or concave surface or area.
凹陷，洼地凹的表面或地区
8.
a concave lens [mirror]
凹透镜 [凹面镜]
9.
A concave surface, structure, or line.
凹面、凹形结构、或凹线
10.
"Single curved moldings include the cavetto (concave, with a quarter-circle profile), scotia (deep concave), flute (grooved),"
单曲线脚包括凹弧饰(具有四分之一圆的轮廓的凹面)、凹形边饰(深凹面)、凹槽饰(开槽的)
11.
tactile surface
有凹凸纹胶条的路面
12.
His eyes [cheeks] have sunk in.
他的眼睛[面颊] 凹下去了。
13.
His cheeks were sunken from hunger.
他的面颊因饥饿而凹陷。
14.
the inequalities of the ground
地面的高低 [凹凸] 不平
15.
Having greater curvature on the convex side than on the concave side.Used of a lens.
凸凹的凸面比凹面曲度更大的。用来指透镜
16.
Having greater curvature on the concave side than on the convex side.Used of a lens.
凹凸的凹面曲率大于凸面曲率的。用于指透镜
17.
a plane with a flexible face that can plane concave or convex surfaces.
有可以刨凹面或凸面的曲面的刨子。
18.
Concavity based in volume (concavity,v) and concavity based on surface (concavity,s), two new concepts to describe the concave degree of 3-D particles were put forward.
本文提出了体凹度和表凹度两个衡量三维粒子凹面程度的新参数；