And three restriction conditions for merging check nodes are proposed in order to get good performance codes.

为保证码字性能，提出了校验节点合并的三个限制条件。

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Therefore, a scientific and rational non-prosecution discretion restriction system is the necessary conditions to guarantee the right performance of the discretion.

因此，科学、合理的不起诉裁量权制约制度是保证不起诉裁量权正确行使的必要条件。

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