名词
中文翻译：投影周长
同义词：
['perimeter projection', "perimeter projection area例句：1. The projector's beam is directed towards the screen at a 45-degree angle.（投影仪的光束以45度角射向屏幕。）2. The perimeter of the park is 1.5 kilometers long.（公园的周长是1.5公里。）"]
例句：
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1. The projector's beam is directed towards the screen at a 45-degree angle.
投影仪的光束以45度角射向屏幕。
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2. The perimeter of the park is 1.5 kilometers long.
公园的周长是1.5公里。
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3. The perimeter of the circle is 6.28 meters.
圆的周长是6.28米。