名词短语
中文翻译：比例的图
同义词：
['proportional diagram', 'ratio chart']
例句：
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1.The engineer drew a compass of proportion to plot the route.
工程师绘制了一个比例图来规划路线。
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2.The teacher used a compass of proportion to explain the concept of angles.
老师用比例图来解释角的概念。
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3. The architect designed a compass of proportion to ensure the building's structural integrity.
建筑师设计了一个比例图以确保建筑的结构完整性。