名词
中文翻译：三叉线
同义词：
['three-line', 'three-dimensional']
例句：
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1. The engineer drew a three-line diagram to illustrate the problem.
工程师画了一条线来说明问题。
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2. The three-dimensional model of the building was impressive.
这座大楼的三维模型令人印象深刻。
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3. The three-line rectangle is used to represent the perimeter of a square.
这个三线矩形用来表示正方形的周长。