The convex aspheric surface has self-aplanatic capability.The range that can be utilized in practice was studied.

分析了自消球差方法检验凸二次非球面实际可用范围。

The combination of convex and plank with sunblind engraving, gives you a beautiful external appearance of building ,and anancient,steady feeling .

凸面板岩,与窗檐雕刻结合,给人予美建筑外观,一种古朴、自然、沉稳感觉.

Utricles convex on both sides; rostra nearly equal to length of kernel; seed free from pericarp; leaves and bracts acicular to spinulose at apex.

胞果凸两面；喙差不多等于珠心长度；种子离生果皮；对具微刺在先端针状苞片。

A physiotherapeutic apparatus for preventing and treating near sighted eye has a convex lens used as objective lens, lens cone, eyepiece, headgear and lens set.

一种防治近视眼理疗器，它有作为物镜凸透镜、镜筒、目镜，还有头套透镜，它用于人们在近距离上长时间用眼时戴在眼上，可以使被视物像清楚、放大变远。

In addition, a sufficient condition of convex fuzzy-valued function getting minimum value is presented, and the method of convexification for a usual fuzzy-valued function is also given.

同时，给出了凸模糊数值函数取得最小值充分条件以及凸化一般模糊数值函数一种方法。

On the other hand,we use a new method of moving neighborhood to simplify the proof for the continuity of a subconvex function defined on a convex in a normed linear space.

另外,本文利用邻域"平移"方法,给出了定义在赋范线性空间内凸集上次凸泛函连续性简捷证明。