凹的

The algorithm for detecting the convexity and concavity of vertices of a simple polygon is commonly used in computer graphics.

简单多边形顶点的凸、凹性判断是计算机图形学中常用的算法。

Concavo-convex business card printing and membership card making two stempelsysteme to a pair of stempelsysteme: one is a recesseda image die (with engraving business card printing and membership card making), the other is a convex image die together.

矮矮制卡和会员卡制息需给两块印模来构不败一差印模：一个是凹进去的图像模（同雕版制卡和会员卡制息差别），另一个是凹下来的图像模。

Location :this circular lines appears in every parts of the iris ,this line appear around the pupil like concentric circle

部位：可出现于虹彩的各部位，环绕瞳孔呈同心圆的凹沟

It is the moderate size scallop on the stone that makes us feel consolatory. It will be filled with water when it rains.

稍稍能安慰我们的，是在那石上有一个不大不小的坑凹儿，雨天就盛满了水。

The secondary mass flux, Z, cavity convergence/divergent angle, and injection angle have different effect on internal performance of DTN.

二次流量、落压比、凹腔扩张角和收敛角、引射角度都对推力矢量状态下的DTN内流性能有着不同的影响。

In order to achieve a tradeoff between vectoring and unvectoring state, the proposed parameters of DTN are: Z=3~4, secondary injection flux is about 3%, cavity divergence angle is about 10°, cavity convergence angle is 20°~30°, injection angle of secondary is about 30° by counterflow injection.

为了实现DTN在推力矢量和非推力矢量下都有较好的内流综合性能，所建议的设计参数为：落压比为3~4，引射量为3%，凹腔扩张角为10°左右，收敛角在20°~30°，引射角度为30°逆流引射角(β=30°)。

According to the practical project "Research on the mechanical optimization of the slope configuration for the Jinduicheng open pit " which the author has engaged in, study on the oval-shaped deep-concave open pit slope with the convex curve has been presented in this thesis.

论文作者通过参与导师《金堆城凹陷露天矿边坡形状力学优化研究》项目所做的研究工作，以金堆城露天矿为研究对象，重点研究了水平面为椭圆形竖直面为凸形的深凹露天边坡。

As shown, a thin convex lens with focus length 10 cm and a concave

如上图所示，一焦距为10 cm的薄凸透镜和一半径为20 cm的凹球面反射镜共轴。P点球心

On a convex surface, the pressure is less than

在凸面上，底面压力变小，向心力与水的自重方向一致；在凹面上，底面压力变大，向心力与水的自重方向相反。

Perianth subglobose, hemispheric, or urceolate, 5-parted or -lobed, slightly fleshy or herbaceous; segments abaxially thickened or becoming winglike or hornlike, rarely not modified, adaxially concave or cucullate.

花被近球形，半球形，或者瓶形，5深裂或者浅裂，稍肉质或草质；背面的裂片加厚的或变得翅状或角状，很少不修改，正面凹或兜状。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。