名词
中文翻译：关键点
同义词：
['pivot', 'pivot point']
例句：
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1. The knickpoint in the story is the reason why the protagonist changed his mind.
故事中的关键时刻是主人公改变主意的原因。
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2. The engineer found the knickpoint where the pipe was damaged and fixed it immediately.
工程师找到了管道损坏的关键点，并立即进行了修复。
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3. During the debate, the speaker made a crucial knickpoint that changed the course of the discussion.
在辩论中，演讲者提出了一个关键的论点，改变了讨论的方向。