...严格的规 则： （1）表中任意两个记录在他们的由候选键组成的列 的组合中都不具有相同的值，即唯一性规则（uniqueness property）； （2）作为候选键的列的组合中，没有一个列的子集 表现出唯一性，即不可简化性规则（irreducabilitySQL实用简明教程二、关系操...
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所有药剂师都受到保密性这一社会规则的约束。
All pharmacists are bound by the society's rules of confidentiality.
许多水上摩托车驾驶员缺乏经验，且对航行规则一无所知，这增加了发生事故的可能性。
Many water scooter operators are inexperienced and ignorant of navigational rules, which increase the potential for accidents.
他的母亲认为她必须做一些戏剧性的事情以防他过上失败的人生，她还制定了一些规则。
His mother convinced that she had to do something dramatic to prevent him from leading a life of failure and lay down some rules.
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