通过数学分析将麻花钻前刃面端截面曲线归纳成广义渐开线；

With mathematic analysis the end section curve of front blade of twist drills is induced into generalized involute;

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与一生成树相关的基本圈是广义圈子空间的一个基底。

The fundamental circuits relative to a spanning tree is a basis of the circ subspace .

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通过建立广义岭估计模型，分析得到平均学费和生均培养费成负相关，与国家生均拨款成正相关。

Through generalized ridge estimator model, we obtain that average tuition and training expense, nation allocation per student respectively have negative and positive correlation.

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