类别学习在近十年受到研究者的极大关注，类别学习有两种形式，分别为分类学习和推理学习。

Category learning is increasingly concerned in the last decade. There are two forms of category learning, classification learning and inference learning.

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非监督学习一般有两种思路。

There are actually two approaches to unsupervised learning.

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这里有一个中式“强逼”的故事。 露露， 7 岁左右，学习两种乐器，正在练习钢琴曲法国作曲家雅克的作品“小白驴”。

Lulu was about 7, still playing two instruments, and working on a piano piece called "The Little White Donkey" by the French composer Jacques Ibert.

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