Methods Hypermetropia and myopia were induced by convex lens in front of eyes of 32 subjects.

Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

配戴低度凸透镜可降低小学生近视的发生率.

Conclusion Wearing lower degree convex lens can reduce incidence rate of myopia in primary school students.

结论配戴低度凸透镜可降低小学生近视的发生率.

A convex lens causes rays to converge on a single point, the focal point.

会聚透镜使光线会聚于一点, 即焦点.

Two kinds of convex lens which make parallel rays converge to the focal point are given.

本文给出两种能使平行光严格聚焦于一点的凸透镜.

He polished the convex lens of his telescope.

他擦亮了凸透镜的望远镜.

There are six various plane and concave-convex lens.

备有六种不同面型和凹凸透镜.

A convex lens is used to concentrate rays of light.

凸透镜用于聚集光线.

This is a convex mirror.

这是面凸面镜.

Through all the optimality sufficient conditions and duality problems were discussed on basis of generalized convexity.

这篇论文在总体上沿着广义凸性的定义来展开讨论有效解的判别条件和对偶问题.

Finally, we also give the duality theorems under the above generalized F convexity.

最后我们亦讨论了(VP)在正切锥真有效解意义下的对偶性质.

Convexity-screw is usually important parts which has highly machining accuracy for mechanical product.

凸形螺杆通常是螺杆机械产品中的重要部件,要求其具有较高的精度.

The things are decided by many factors, and they always appear convexity.

事物的“居中”与“多元”是由事物内在的多个因素所决定.

Weak duality theorem is established under generalized convexity conditions.

在广义凸性条件下,建立了弱对偶性定理.

The convexity of the seed capsule is of decisive importance in host selection.

种子囊的突起对寄主的选择起着决定性的作用.

Mahoney had never seen such a conveyance before.

马奥尼以前从来没有见过这样的运输工具。

the conveyance of goods by rail

由火车运输货物

Conveyance of compressed air and inert gas under normal temperature.

常温下输送空气及惰性气体.

Conveyance of water and neutral liquids temperature.

常温下输送水及中性液体.

To serve as a means for the conveyance of; transmit.

作为传送工具而用; 转送.

They waited at the door in groups be taken in some conveyance that I couldn't see.

他们成群结队地等在门口,让一种我看不见的运输工具载走.