In a one-to-one relationship, a row in table a can have no more than one matching row in table b, and vice versa.

在一对一关系中，表a中的一行最多只能与表b中的一行相匹配，反之亦然。

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Each number below corresponds to that row in the table.

下方的每个数字都对应于表中的相应行。

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And we know as we go across a row in the periodic table, what's happening is that z effective or the effective pull on the nucleus is increasing.

而我们知道沿着周期表的某一行向右看，有效核电量,或者说原子核的有效引力是在逐渐增大的。

麻省理工公开课 - 化学原理课程节选

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