You must be careful not to cross the boundary.

你可要小心不要越界哦。

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This paper think that knowledge always keeps flowing and it may cross the boundary of an enterprise.

本文认为知识是流动的，而且它会超越组织边界，使企业与客户之间形成知识互动的合作伙伴关系。

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If you are afraid of being ridiculed or are frightened to cross the boundary of your dull life, you can never achieve your dreams.

假如你害怕被嘲笑或是不敢打破乏味的生活，那就永远不能实现自己的梦想。

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He said, "If I cross the Halys River, that's the boundary between Lydia and Persia, what will happen?" The oracle replied, "A great empire will be destroyed," And Croesus said, "Terrific that's what I have in mind."

如果我跨过了哈吕斯河,那是吕底亚和波斯的分界线,会有什么后果,神谕回答说,一个伟大的帝国将被摧毁,于是克洛伊索斯说,太棒了,正如我愿

耶鲁公开课 - 古希腊历史简介课程节选

Now, traditionally female-oriented brands such as Dove are attempting to cross the gender boundary.

WSJ: Men's Grooming With Will Arnett and Jason Bateman: Hello, 'Mansome'

Hamilton showed Watson little respect when he danced down the wicket before cross-batting him over the mid-on boundary in an over that cost 10 runs.

BBC: Australia ease to win over Scots

Kaushalya Weeraratne hit a mammoth six onto the adjacent moto-cross track, but that proved to be the final boundary for Sri Lanka, as the final four overs produced only 18 runs.

BBC: Pakistan recovery sinks Sri Lanka