Because there is no abrasion between the concave and convex, the nut is reusable.
由于凹面与凸面之间没有磨损，螺母可以重复使用。
A small curve in the sliding part of the convex top of the lower nut acts as the wedge.
下螺母凸顶的滑动零件上有一条小弧线充当楔块。
It is locally convex in the sense that it has no loops and the curvature never changes sign.
它的局部是凸的，因为它没有环路，且曲率永远不会改变符号。
You will then be making circles around the other car, but when seeing from above, both of you are driving forward all the time and your path will be convex.
然后你将会一直绕另一辆车转，但当你从上面看，你们两个一直在向前行驶且你们的路径是凸形的。
They're lenses because they're convex vessels, and when they're full of water, they act as a lens and you see the horizon in them, upside down and backwards.
它们是透镜，因为它们是凸面容器，当它们盛满水后，它们可作为透镜使用，你可以看到它们里面上下颠倒的地平线。
Water surges from the cells on the inside of the leaf to those on the outside, causing the leaf to rapidly flip in shape from convex to concave, like a soft contact lens.
水从叶子内部的细胞涌向外面的细胞，导致叶子迅速地从凸向凹翻转，就像一片柔软的隐形眼镜。
Each cell in a Voronoi tessellation is a convex polyhedron.
泰森多边形法中的每个细胞镶嵌是一个凸多面体。
The relation between the completeness of several local convex topology and that of induction topology was pointed out in this paper.
指出了几种局部凸拓扑的完整性与感应拓扑的完整性之间的关系。
Concavo-convex veins are always used in the design of woolen sweater.
凹凸纹通常用于羊毛衫的设计中。
Back after excessive convex problems to solve.
解决上背部过度后凸的问题。
TheNavMesh stores this surface as convex polygons.
导航网格把这个表面存为凸多边形。
Because the table head comparison convex, to avoid it by knocking.
由于表把头比较凸出，要尽量避免它受到磕碰。
The dorsal surface of its cuttlebone is yellowish and evenly convex.
它的侧背面是微微的黄色，并且均匀的突起。
'It's all about having those convex surfaces to reflect light,' he trills.
“那就是用这些凸面来反光，”他说。
Linear programs with several reverse convex constraints are discussed.
讨论带有多个反凸约束的线性规划。
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。
Putting water into the lens' chamber turns the normally flat lens a convex hemisphere.
将水注入镜头的腔中时，会把平时平面的镜片变成凸出的半球。
The core is a set which satisfies a system of weak linear inequalities, so it is closed and convex.
中心是一个满足弱线性不等式的合集，因此它是封闭的、凸的。
Convex Cuts: Tips and techniques for creating sharp, convex details in geometry under subdivision.
凸形切割：在细分下在几何形状中创建尖锐，凸形细节的提示和技术。
The award took the shape of an eight pointed convex cross with a mobile swastika in the center disk.
勋章采用了指向八个方向的凸面十字并有一个万字于中心。
This blade has a gentle, sloping convex curve to the point versus the concave curve of the clip blade.
相对于回形刀刃的凹曲线而言，这种刀刃具有一条延伸到刀尖的、温和的凸斜率曲线。
We prove that the Lagrangian dual bound is identical to the lower bound obtained by convex relaxation.
并且证明了拉格朗日对偶界与通过凸松弛得到的下界是相等的；
Stop: slightly defined, as a transition from the convex skull region to the slightly concave foreface.
停止：轻微的定义，作为一个地区过渡到凸头骨稍凹脸。
As seen here, some sapphires, when cut to a convex shape, exhibit a striking six-pointed star in direct sunlight.
正如我们所见，被切割成凸镜状蓝宝石会在阳光直射下呈现出一个六角星。
The moon was above us, a convex shape almost crushing us, a ruined roof, studded with holes like a cheese grater.
月亮就在我们上方，凸面对着我们仿佛要把我们挤压粉碎，像一个荒废的屋顶，满目疮痍像一个干酪粉碎机。
For this reason, any large, flat areas should be crowned convex to prevent dishing in the reverse direction.
同样原因，较大的平坦表面应稍拱起以避免在相反方向凹下。
Finally, optimality necessary and sufficient conditions for nonlinear convex semidefinite programming are proved.
并给出了非线性半定规划的最优性必要和充分条件。
Finally, optimality necessary and sufficient conditions for nonlinear convex semidefinite programming are proved.
并给出了非线性半定规划的最优性必要和充分条件。
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