名词
中文翻译：切线投影
同义词：
['tangential projection', 'tangential projections']
例句：
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1.The projector's screen is perpendicular to the wall at the point of tangency.
投影仪的屏幕与墙壁在接触点处垂直。
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2.The tangential projection of a circle onto a plane is an ellipse.
圆在平面上的切线投影是一个椭圆。
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3. The tangential projection of the sun onto the earth's surface is the sunrise and sunset.
太阳在地球表面上的切线投影是日出和日落。