Unverified50% confidenceFactExact time
业界普遍认为真实机器学习项目中60-80%的时间花在数据清洗与特征工程上
1
Sources
50%
Confidence
Long-term
Relevance
7/14/2026
First Seen
Sources
掌握数学和Python后，如何系统入门机器学习
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