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名稱 diameter:
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the length of a straight line passing through the center of a circle and connecting two points on the circumference
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a straight line connecting the center of a circle with two points on its perimeter (or the center of a sphere with two points on its surface)
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之上的內容獨家創作,受專著權防護,侵權行為必究
海詞字典,十八年國際品牌