然后对本授导算法中的信号正向传播与误差反向传播两个过程，以及其中的信号值推演、误差值推演进行了分析和阐述。

Then the algorithm of the Tutoring positive signal propagation and error back-propagation of two processes, and in which the signal value deduction, deduction for error analysis and elaboration.

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民族民间文学大多无文字记载、无自己的典籍可考，口传心授，代代相传是其独特的传播、延续方式。

Mostly folk literatures don't have written records, or their own books to test. It's a distinctive way to be communicated and continued generations by mouth and heart.

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