Four interesting formulas for the block matrix inversion are derived from equivalent transformations of multi-port network parameters in this paper.

在对多端口网络参数的等效变换中，得到了几个有趣的分块矩阵求逆公式。

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To accomplish this, transformations must be carried out in the following four aspects: First from teacher-oriented to student-oriented educating.

完成新旧教育模式的转换，要实现四个方面的转化：一、以教师为主体向以学生为主体转化；

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But the rarer three-and four-lepton events suggest a complex cascade of transformations that may prove difficult to unravel.

但是，比较罕见的三轻子和四轻子事件却暗含着有一个复杂的级联衰变，这是很难解释的。

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But the rarer three-and four-lepton events suggest a complex cascade of transformations that may prove difficult to unravel.

但是，比较罕见的三轻子和四轻子事件却暗含着有一个复杂的级联衰变，这是很难解释的。

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