对列表（以及其他值序列）进行操作的两个关键函数是 first（返回第一项）和 rest（返回其余项的清单）。

Two key functions for operating on lists (and other sequences of values) are first (which returns the first item) and rest (which returns a list of the rest of the items).

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该方法可有效地避免在利用“树支组导纳积”构造符号网络函数过程中遇到冗余项问题。

The method can effectively avoid redundant team in the proceeding of structuring symbol network functions using "tree-team admittance product".

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对生成符号网络函数的重要技术问题——冗余项问题进行深入分析。

The redundancy item problem which is an important technical problem of generating symbolic network function is discussed.

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