At last we know why the Columbine killers did it.

至少,我们知道了为什么那两个克伦坂中学的学生会杀了那么多的同学.

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This was after the ( column by ) Columbine high school shootings in Calorado.

此次事件是发生在 卡罗拉 多州哥伦比亚高中枪击事件之后.

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Pierrot, Harlequin, and Columbine will go to bed late this evening.

小丑, 丑角和哥伦拜恩会今天晚上睡觉晚.

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Drawer principle, be called again drawer principle, columbine basket principle or shoe box principle.

抽屉原理, 又被称为抽屉原则, 鸽笼原理或鞋盒原理.

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