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渐开线
在平面内,一条直线切于一个固定的圆并沿着圆的外侧作纯滚动时,此直线上任一点的轨迹。
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ecoimmunology
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Ecole des Beaux-Arts, Paris
Ecole du Patrimoine Africain–EPA
Ecole Nationale Supérieure des Arts et Industries Textiles
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E.coli infection in neonatal meningitis
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