valence rule
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价数规划
... 极性价数 polar number 价数规划 valence rule 价数规则 valence rule ...
The valence electron count of stably electronic configuration in these cluster molecules obeys 9n-l rule.
在这些分子簇中稳定电子组态的价电子数符合9n - L规则。
According to "group-valence" and the rule of contracting, the size of character-picture can be contracted without changing their structure.
根据“团价矩阵”和收缩规则,本方法可在不改变原字符图象结构的同时缩小字符图象。
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