In machine learning, the problem of unsupervised learning is that of trying to find hidden structure in unlabeled data.

可以简单的理解为：非监督学习是指，尝试从未标注的数据中，寻找隐藏的结构。

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The "tragic spirit" is Ibsen's character as well as the keynote of his Romsersholm which is a text with a hidden structure deliberately encoded by the dramatist.

“悲剧精神”是亨利克·易卜生的品格，也是他的《罗斯莫庄》的基调。《罗斯莫庄》是一个包含着某种隐藏结构的文本，这多少是由于作者自己有意识地将其编进密码的。

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This paper introduces a successful case of revealing a hidden structure danger by supervision inspection, and discusses the proper sequence of supervision and accident treatment.

本文介绍了一个通过监督检测及时发现工程隐患的实例，并对如何开展监督检测及事故处理的程序进行了探讨。

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God is the Dieu cache: God is the hidden God who is absent from the world and is, in effect, also the structure of the world. The same thing can be said of man.

上帝隐藏起来了：,上帝是隐藏于世界之外，同时，又是世界的结构，人类亦如此。

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Ironically, the man most adept at manipulating this hidden power structure is one of Iran's best-known characters--Ali Akbar Hashemi Rafsanjani, who has been named an ayatollah, or religious leader.

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