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Many existing data mining and machine learning techniques fail when training and test data have different distributions or feature spaces.

众所周知，当训练数据和测试数据的分布或特征空间不同时，许多数据挖掘和机器学习技术很有可能会失败。

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This paper has defined the role orientation of academic leaders, and proposed the basic working ideas when training academic leaders in the course of the major construction.

本文明确了专业带头人的角色定位，并提出了高职高专院校进行专业建设、培养专业带头人的基本思路。

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He first became interested in studying infectious disease when he volunteered in Surinam during his medical training.

VOA: special.2011.05.25

As a result of this sort of conditioning, he then when he experiences real world violence, he responds with nausea and shock; basically, training him to get away from these acts of violence.

作为这种条件作用的结果，当他在现实中经历暴力行为时，便会引起恶心和休克;,总体来说，就是训练他远离暴力行为。

耶鲁公开课 - 心理学导论课程节选

so at the moment when I can't go back to see her, I go to training academies.

所以我不能回去找她的时候，我就去培训学校。

做头发是免费的 - SpeakingMax英语口语达人

He was electrocuted when training equipment he was carrying touched an overhead power cable.

BBC: Young 'so vulnerable' at work

Earlier, the US military commander in Africa said the Pentagon had made mistakes when training Malian troops in recent years.

BBC: Mali crisis: Troops 'take northern town of Hombori'

"My legs were getting stiff as I'm not used to running that slow, even when training, " said O'Sullivan, who heeded advice not to go off too quickly.

BBC: Kenyans sweep NYC Marathon