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- Then, electroforming the ellipsoid was used to form a concave mold. 将椭圆光阻透镜进行微电铸，电铸成分为镍。
- A concave molding with a cross section that approximates a quarter circle. 飞檐的凹圆线脚截面近于九十度弧的凹线脚
- A concave molding. 凹圆形凹陷的线脚
- Today's wiped intended as a concave mold, used to suppress the molding clay reliefs. 如今的擦擦意为一种凹形模具，用来压制出成型的泥塑浮雕。
- a concave molding with a cross section that approximates a quarter circle 截面近于九十度弧的凹线脚
- A concave surface, structure, or line. 凹面、凹形结构、或凹线
- Was dark red apples, go on top of a concave hole. 莲雾呈深红色的，顶上有一个凹下去的小孔。
- A long stick with a concave attachment at one end for shoving disks in shuffleboard. 推铲一端带有凹头的长棒，用于在打圆盘游戏中推动圆盘
- The graph of a concave function is always below its tangent. 一个凹函数的图象总在它的切线的下方。
- There is a concave rose garden of ground down inside his courtyard. 在他的庭院里，有一片凹下地面的玫瑰花园。
- The graph of a concave function is always below its tangent . 一个凹函数的图象总在它的切线的下方。
- A concave bone of the human foot,located between the talus and the metatarsals. 脚的舟骨人脚上的凹骨，位于踝骨和骨之间。
- A concave bone of the human foot, located between the talus and the metatarsals. 脚的舟骨人脚上的凹骨，位于踝骨和骨之间
- Dimple - A concave depression found on the surface of a wafer that is visible to the eye under the correct lighting conditions. 表面起伏-在合适的光线下通过肉眼可以发现的晶圆片表面凹陷。
- A percussion instrument consisting of a concave brass plate that makes a loud clashing tone when hit with a drumstick or when used in pairs. 钹一种打击乐器，由一个凹铜片构成，当用单个或者双个鼓槌敲击时，可发出高的撞击声
- A concave lens causes rays to diverge as though they are coming from a focal point. 发散透镜使光线分开,就好象从焦点上发出来的那样。
- A concave bend of a handrail where a sharp change in level or direction occurs, as at a stair landing. 弯子栏杆的凹弯，此处有急骤的高度或方向变化，如在楼梯底座处
- Now there is a hyperboloid, a concave ellipsoidal surface and a convex ellipsoidal surface need to be done. 现在是一个双曲面,一个凹椭球面,一个凸椭球面。
- A concave bend of a handrail where a sharp change in level or direction occurs,as at a stair landing. 弯子栏杆的凹弯，此处有急骤的高度或方向变化，如在楼梯底座处
- A concave mirror would project a real inverted image of the silverpoint onto the panel, which van Eyck would trace. 凹面镜把颠倒的实像投射到木板上，于是范艾克便可以在板子上描画。
