我见过许多在UNIX平台上使用—p选项的情况，并且帐户的主要分组会随时间变化。
I have seen a number of cases in which the -p option was used on UNIX platforms and the primary group of the account changed over time.
除非有一张拥有很多你不需要的字段的遗留表，否则不应该使用这种抓取策略，因为它的延迟属性分组会带来额外的SQL。
Unless you have a legacy table that has many columns you don't need, this fetching strategy usually can't be justified since it involves extra SQL for the lazy property group.
在归纳式学习方法中，对样本数据的不同分组会直接影响到所生成的反映变量间相互关系的规则，从而影响到对新样本的识别效果。
In inductive learning approach, how to discretize the sample data can directly affect the creation of the production rules and the recognizing result.
在归纳式学习方法中，对样本数据的不同分组会直接影响到所生成的反映变量间相互关系的规则，从而影响到对新样本的识别效果。
In inductive learning approach, how to discretize the sample data can directly affect the creation of the production rules and the recognizing result.
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