esystem坐标系系定理;系;推论coplanar共面coplanarforces共面力coplanarlines共面co-prime互质;互素corollary系定理;系;推论correctto准确至;取值至correlation相关correlationcoefficient相关系数correspondence对应correspondingangles(1)同位角;(2)对应角correspondingelement对应边correspondingsides对应边cosecant余割cosine余弦cosineformula余弦公式costprice成本cotangent余切countable可数countableset可数集countablyinfinite可数无限counterclockwisedirection逆时针方向;返时针方向counterexample反例counting数数;计数couple力偶Carmer'srule克莱玛法则criterion准则criticalpoint临界点criticalregion临界域cirticalvalue临界值cross-multiplication交叉相乘cross-section横切面;横截面;截痕cube正方体;立方;立方体cuberoot立方根cubic三次方;立方;三次(的)cubicequation三次方程cubicrootsofunity单位的立方根cuboid长方体;矩体cumulative累积的cumulativedistributionfunction累积分布函数cumulativefrequecy累积频数;累积频率cumulativefrequencycurve累积频数曲cydistribution累积频数分布cumulativefrequencypolygon累积频数多边形;累积频率直方图
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