A statistic interpretation of action principle is proposed, in which the action of physics field is equal to the free energy of a statistic system hidden in background.
本文提出最小作用量原理之统计解释，将作用量等价于物理场背后潜在统计系统之自由能。
The principle and the action of CATV device control system is introduced. The hardware and the software of the controller of power, how to deal with the switch method of remote signal is explained.
介绍了闭路电视前端设备控制系统的原理和作用，着重说明了电源控制、信号切换控制的原理和电路，以及控制流程图与软件。
The writ system stipulated the form of action, which formed the principle of procedures preceding right in the common law.
令状对诉讼形式的规定使普通法形成了程序先于权利原则，并使英国法在司法审判中通过判例得以积累。
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