The modular design of 25 type passenger cars is described in detail from such aspects as the principle, purpose, regulation, procedure and requirements of modular division of various parts.

从原理、目的、原则、程序、各部位模块划分的要求等几个方面对25型客车模块化设计做了详细说明。

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He understood American power, in all its complexity, and believed that when it is applied with purpose and principle, it can tip the scales of history.

WHITEHOUSE: Remembering Richard Holbrooke

The main purpose of thought experiments, though, is to show that a problem is soluble in principle and so to encourage others to try to solve it in practice.

ECONOMIST: The universe, it appears, may not be alone