这个词是什么意思？
Supervised or unsupervised machine learning methods that use multiple layers of data representations generated by nonlinear transformations, instead of individual task-specific ALGORITHMS, to build and train neural network models.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000077321 · MeSH 2026。
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