对代数方程，即多项式方程，方程P(x) = 0有根x = t则说明P(x)有因子(x - t)，从而可做多项式除法P1(x) = P(x) / (x-t)结果仍是多项式。若P1(x) = 0仍以x = t为根，则x = t是方程的重根。
... double roller chain coupling || 滚子链联轴器 double root || 重根 double rotor-stator stepper || 双定(子双)转子步进电动机 ...
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该文还阐明了对二阶对称张量成立的关于特征方程的重根与重向的一些结论对非对称二阶张量不一定成立。
The paper illustrates the conclusions about the multiple root of characteristic equation and characteristic vector which fit symmetric tensor of rank two may unfit unsymmetric tensor.
研究了三阶Poincaré差分方程解的渐近性质。这种差分方程对应的常系数线性差分方程的特征方程有重根。
We studied the asymptotic behavior of solutions to third order Poincaré difference equation whose characteristic equation has multiple roots.
第一次，爸爸无法举起一根重木时，他只是开了个玩笑；但那天晚些时候，我看到他独自在外，用力的想举起木头。
The first time he couldn't lift a heavy log, he joked about it; but later that same day I saw him outside alone, straining to lift it.
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