名词
中文翻译：负角
同义词：
['negative angle', 'negative angle', 'negative angle']
例句：
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1. Thephysicist calculated the angle of the light beam with a negative angle.
物理学家计算了光束的负角度。
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2. In mathematics, a negative angle is used to indicate an obtuse angle.
在数学中，负角度用来表示钝角。
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3.The engineer measured the angle of the roof with a protractor and found it to be a negative angle.
工程师用卡尺测量屋顶的角度，发现它是负角度。