Human indignation evolved from an uncertain source.

人类愤恨的情感来源不明。

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Scientists believe water activity affected this plateau after the formation of the nearby canyons. Although the source of water and sediment remains uncertain.

科学家相信，在附近峡谷形成之前这片高原受到过水的影响，虽然水源和泥沙的问题仍不明朗。

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In order to get the better useful information from the exam data, which with complex and uncertain data, it is necessary to preprocess the source data.

为了更好地从大量复杂的和不确定的考试数据中有效地挖掘有用的信息，必须对源数据进行预处理。

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BBC's source was uncertain.

ECONOMIST: Politics

It is uncertain when the Nordic lands first became a source of trendiness.

NEWYORKER: Aska

According to a source speaking to the Wall Street Journal, the future is uncertain for the product, and Microsoft may not move forward with it at all.

FORBES: The Future is Uncertain for Microsoft's Xbox TV