英语词汇commutation rules怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	commutation rules
释义	commutation rules 简明释义对易规则双语例句 1 The commutation algorithm toward null value for data dependent on satisfactory conditions in relational database is discussed and the related definitions, rules and theorems are put forward. 讨论了关系数据库的空值与数据依赖满足性变换算法，并给出了有关的定义、规则、定理与变换算法。
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