这种类型的游戏，尤其是积木游戏，可以帮助孩子们发现和发展数学和几何的关键原理。

This type of play, especially with building blocks, helps children discover and develop key principles in math and geometry.

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介绍了工业机器人测试系统的发展现状及性能测试仪的工作原理。

The developing status of the admeasuring system for industrial robot and the work principle of performance admeasuring apparatus are introduced.

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文中介绍了其机构原理及性能，并指出了该产品的发展前景。

This paper describes the principle and feature of its mechanism and the perspective of its development.

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He seems to have known something about the modern economic theory of society long before modern economics was even developed.

而且是公开的驳斥,他似乎已知现代社会的经济原理,且是在现代经济学开始发展之前。

耶鲁公开课 - 政治哲学导论课程节选