The second part is focused on the philosophical observation on the theory and its development history.

第二部分是对权变学说的哲学审视和理论发生史研究。

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The concept of smart materials is introduced with its development history recalled. And the research and application prospect of smart textiles are described.

阐述了智能材料的基本概念，回顾了智能纺织品的研究历程，并提出了智能纺织品的研究及应用前景。

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The structure of hydraulic cone crusher and its development history are introduced in brief. The influence of crusher's main data on crushing performance is discusses.

简述了当代液压圆锥破碎机的结构和演变历史，讨论了主要参数对破碎工艺性能的影响。

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The move will come as a major embarrassment to the European Tour who had rebranded itself around the sponsorship and described the launch of the Race to Dubai as the most significant development in its history.

CNN: Race to Dubai suffers prize money crisis

Google has a long history of supporting the development of free software through its Summer of Code program.

FORBES: Google Really Is Less Evil Than Its Competitors

Klein hopes to kick-start the trend today with the biggest technology release in the company's history, including new versions of its operating system, middleware and development suite.

FORBES: Wind River Gets Smart