介绍了文法化简中消除无用符号和无用产生式的树型算法，并通过实例予以验证。

This paper introduces a new tree algorithm that is for deleting superfluous symbol and production in grammar, and gives a practical example to check the algorithm.

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这种行政分治附带着一种毫无用处的符号。

The administrative split carries an unhelpful symbolism.

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这种行政分治附带着一种毫无用处的符号。

The administrative split carries an unhelpful symbolism.

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