This system is based on the principle that speed multiple time equals length. With sound-control circuit and a single chip, the equipment can measure, check, display, print etc.

该系统基于速度乘以时间等于距离的原理，运用声控电路和单片机，具有测量、校准、显示、打印等功能。

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The principle of printing on print is introduced.

简要介绍了叠色印花的原理。

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Making using of the integrate principle of mechanism, electronics, optics, liquid factors, have designed a suit of feasible control blue print.

综合考虑了机、电、光、液等方面的因素，设计了一套切实可行的控制方案。

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In principle, the US government could print up or borrow a ton of money, hand it to state governments, and then have all the money used to cut taxes rather than to finance programs.

FORBES: Why Borrow Now, Tax Later Is A Bad Idea