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- periscopic concave 周视凹面
- periscopic concave lens 周视凹透镜
- His figure looks very funny in the concave mirror. 他的样子在凹镜里显得非常可笑。
- An indented or concave surface or area. 凹陷，洼地凹的表面或地区
- Just as a double convex lens enlarges, so a double concave lens reduces. 正象双凸透镜可以放大那样，双凹透镜也可以缩小。
- 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 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
- The palm of one's hand is slightly concave. 人的手掌是微凹的。
- A concave surface, structure, or line. 凹面、凹形结构、或凹线
- Concave on both surfaces;biconcave.Used of a lens. 双面均凹进的；双凹的。用于指透镜
- Concave on one side and convex on the other. 一面凹进一面凸起的
- Convex on one side and concave on the other. 凸凹的一面凸一面凹的
- To the excellent concave and convex carving skill. 碑上的阴阳刻。
- An indentedor concave surface or area. 凹陷,洼地凹的表面或地区。
- Fault: Convex or concave muzzles. 缺陷：突起或凹入的口部。
- Concave on both surfaces;biconcave. 双面均凹进的；
- Is it the concave silver mace in legend? 这就是传说中的凹面银锏？
- 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。
- Petals 3, concave, imbricate in bud. 花瓣3，凹，在芽中覆瓦状。
- Measure the concave mark and crackle of pipe. 直接测量导管外表面之凹痕及裂纹深度。
