This factor has been dubbed "the second derivative", or the rate of change of the rate of change.
这一因素被称为是“二阶导数”，或者是变化率的变化率。
The force and moment exerted on the solid body are expressed as the rate of change of the first-and second-order kinetic vorticity moments, respectively.
作用在任意运动物体（系）上的力和力矩可以分别表示成流场中动力学涡量的一阶矩和二阶矩随时间的变化率。
After training of disinfection worker, repair of sprayers and change of disinfectants, the eligible rate of disinfection in second drill was 100%(240/240).
经过培训消毒员、维修喷雾器和更换消毒剂，第2次演练的消毒合格率为100%（240/240）。
Second, by using empirical method, we find out that the distribution of the change of foreign exchange rate is not normal distribution but fractal distribution.
然后通过实证，指出了外汇汇率变化不服从正态分析，而是服从分形分布；
The induced net minus energy of a closed universe equals the density rate of the second time change multiplying a constant.
闭合宇宙感应的净负能量与能量密度的两阶导数变化量成正比。
To obtain desired wave characteristics of composite laminate, the varying rate of eigenvalue with respect to the thickness change is approximated by the second order Taylor expansion.
采用一种特征值反求形式的方法用来近似层状复合板的波动特性修改。
Second is the possibility that, having seen little impact from the previous exchange rate flexibility, some in the us Congress may be in less of a mood to accept anything but a dramatic change.
第二点是，美国国会已经看到上次中国调整汇率并没有带来多大影响。因此，除非这次人民币大幅调整，否则他们中的一些人可能不会满意。
Second is the possibility that, having seen little impact from the previous exchange rate flexibility, some in the us Congress may be in less of a mood to accept anything but a dramatic change.
第二点是，美国国会已经看到上次中国调整汇率并没有带来多大影响。因此，除非这次人民币大幅调整，否则他们中的一些人可能不会满意。
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