There are certain rules for sampling right?
抽样有一定的规则，是吗？
There are certain rules for sampling, right?
抽样有一定的规则，是吗？ ？
A stratify sampling algorithm for extracting classification rules is proposed in the dissertation.
提出一种面向分类规则提取的分层抽样算法。
A stratify sampling algorithm for extracting classification rules is proposed in the dissertation.
提出一种面向分类规则提取的分层抽样算法。
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