他诧异，这是大规模的总和计算，分别从不同的估计。
He was astonished to learn that this sum total of mass is different from a separately computed estimate.
这一估计是根据全班学生可额外增加未来收入的现值总和计算的。
That's the present value of the additional money that a full class of students can expect to earn over their careers.
在每次成功收敛非线性分析的最后，用旧的总荷载系数与当前荷载比的总和计算总荷载系数。
The total load factor is computed as the sum of the old total load factor and the current Loading Rate at the end of each successfully convergent nonlinear analysis.
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