Cluster models can perform much of the computation offline, but recommendation quality is relatively poor.

聚类模型能离线运行大量的计算，但推荐品质相对较差。

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Therefore, with the idea of multi-dimensional poverty, this paper will use the principal factor and cluster approach to define poverty, and on this basis, explore the characteristics of poor people.

因此，本文首先从多维贫困的视角出发，利用主因子和聚类的方法来界定贫困人口，并在此基础上，探寻贫困人口的贫困特征。

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Supposedly resulting from abnormal antenatal exposure to hormones, this cluster includes maleness, homosexuality, left-handedness, poor visual-spatial skills, immune disorders, and perhaps also language-learning talent.

ECONOMIST: What makes some people learn language after language?