1.
biconcave:Concave on both sides or surfaces.
两面凹的:两侧或两面凹陷的。
2.
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；
3.
Convex on one side and concave on the other.
凸凹的一面凸一面凹的
4.
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
5.
The worn wheel tyre contact surface has a concave revolutionary curved form with two principal curvatures.
磨耗后的车轮接触面,是内凹圆弧的旋转形成面,有两种主曲率。
6.
The groove at either end of a bow for holding the bowstring.
弓上的凹口弓两端用来缚弓弦凹口
7.
Concave on one side and convex on the other.
一面凹进一面凸起的
8.
A slight depression or indentation in a surface.
凹痕表面上轻微的下陷或凹陷
9.
An indented or concave surface or area.
凹陷，洼地凹的表面或地区
10.
The only little change that the face ever showed resided in the two compressions or dints.
这面孔上所仅有的小变动全在这两个凹处或瘪处。
11.
a concave lens [mirror]
凹透镜 [凹面镜]
12.
You will become sallow and hollow-cheeked, and dull-eyed.
你会变得面如土色，两颊凹陷、眼光迟滞。
13.
A concave surface, structure, or line.
凹面、凹形结构、或凹线
14.
"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)
15.
tactile surface
有凹凸纹胶条的路面
16.
His eyes [cheeks] have sunk in.
他的眼睛[面颊] 凹下去了。
17.
His cheeks were sunken from hunger.
他的面颊因饥饿而凹陷。
18.
the inequalities of the ground
地面的高低 [凹凸] 不平