名词
中文翻译：单位盘
同义词：
['unit circle', 'unit circle', 'unit circle']
例句：
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1. The engineer used a unit disc to measure the length of the pipe.
工程师使用一个单位圆盘来测量管道的长度。
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2. The teacher demonstrated how to use a unit disc to calculate the area of a circle.
老师演示了如何使用单位圆盘来计算圆的面积。
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3. The student was confused by the concept of a unit disc and its application in mathematics.
学生对单位圆盘及其在数学中的应用感到困惑。