By the technique of transplantation application, the author manufactured the practical objective lens with high image quality, which has the similar structure as that of photographic lens.
将照相物镜移植应用于其它系统大孔径、大视场物镜设计中，生产出与照相物镜结构相似、像质优良的镜头。
This chapter presents a series of practical steps, keeping that objective in mind.
这一篇文章提供了一系列的实用步骤帮你记住你的目标。
Finding and hiring a team of Objective-C developers is costly and not very practical, unless you plan to focus entirely on iPhone application development.
寻找和雇佣一个Objective - C语言的开发团队代价是很高的且不实际。除非你计划完全集中在iPhone的应用开发上。
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