名词
中文翻译：等效圆的直径
同义词：
['equivalent circle diameter', 'diameter of an equivalent circle']
例句：
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1. The engineer calculated the diameter of the pipe to ensure it was within the required size.
工程师计算了管道的直径，以确保其符合所需尺寸。
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2.The scientists found that the diameter of the new planet was significantly larger than the previous one.
科学家们发现，新行星的直径显著大于前一个。
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3. The construction company measured the diameter of the tunnel to determine its feasibility.
建筑公司测量了隧道的直径，以确定其可行性。