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- The characteristic of the contact action is deeply investigated, and with an exemple of convex concave joints in one pontoon bridge, two kinds of contact finite element model are established. 深入考察接触行为的特点,并以舟桥纵向连接件丙丁接头为例,建立了两种接触计算模型。
- Function's convex concave and inflection point 曲线的凹凸与拐点
- Application: Heat fin, mainframe shell, concave and convex glass and etc. 适用:散热片.主机外壳.主机外壳.凸玻璃.平玻璃...等。
- 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 rhythm instrument consisting of a pair of slightly concave shells of ivory or hardwood, held in the palm of the hand by a connecting cord over the thumb and clapped together with the fingers.Often used in the plural. 响板一对由象牙或硬木制成的有轻微凹形的板子组成的一种节奏乐器，通过一段连在拇指上并和其余手指结合的线绳握在手掌中。通常用作复数
- A rhythm instrument consisting of a pair of slightly concave shells of ivory or hardwood, held in the palm of the hand by a connecting cord over the thumb and clapped together with the fingers. Often used in the plural. 响板一对由象牙或硬木制成的有轻微凹形的板子组成的一种节奏乐器，通过一段连在拇指上并和其余手指结合的线绳握在手掌中。通常用作复数
- 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。
- Fault: Convex or concave muzzles. 缺陷：突起或凹入的口部。
- Keep down of you'll be hit by shell fragments. 别起来，否则你会被弹片击中的。
- The snail retreated into its shell. 蜗牛缩进壳里去了。
- 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
- A shell splinter embedded itself in the wall above his head. 在他头上方的墙壁上嵌有一块小小的贝壳片。
- His figure looks very funny in the concave mirror. 他的样子在凹镜里显得非常可笑。
- The building was burned to a shell. 大楼被烧得只剩下空骨架。
- The despair left him a mere shell of a man. 他陷入绝望，形同躯壳。
- An indented or concave surface or area. 凹陷，洼地凹的表面或地区
- She crumbled an empty snail shell in her fingers. 她用手指捏碎了一个空蜗牛壳。
- A snail's shell is spiral in form. 蜗牛壳是螺旋形的。
