Predating CAD, this geometric linear- and arc-based approach evolved out of the mental constructs of design technique, industrial fabrication, and reproduction of the objects of the 20th Century.
由我们心中所想衍生出的，几何化的直线、曲线为基础的早期CAD，决定了整个20世纪的设计技术，工业生产和物品的复制和再生产。
To solve this problem, this paper designs and implements a geometric teaching system based on PUI (Pen User Interface), and applies technique of bidirectional geometrical constraint to this system.
针对这个问题该文基于人机交互中的笔交互技术，设计并实现了一套几何教学系统，并将双向几何约束的相关技术应用于该系统中。
Laser hologram technique combines geometric optics, ware optics and information optics together, presenting a bright future for the study of optics.
激光全息摄影技术集几何光学、动光学和信息光学为一体，为光学的研究展示了美好的前景。
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