In each subsystem, the paper analyses its form, working process, user's model and typical algorithms from the point of object-oriented and technology of active mechanism separately.

在每个子系统中，本文分别从支持面向对象和主动机制技术的角度，分析了子系统的组成、工作流程、用户使用模式和典型算法等。

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Working at such a fine level of internal detail allows the stiffness and flexibility of an object to be determined at any point, says Siavash Mahdavi, the chief executive of Within Technologies.

ECONOMIST: 3D printing

Many of those who object to the change in the law don't point to moral concerns.

BBC: Soft launch for the soft opt out

The laser would only singe the surface of an object in space, but that tiny burn could still help point it downward, Dr. Campbell says.

WSJ: A Cosmic Question: How to Get Rid Of All That Orbiting Space Junk?