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。

youdao

Regardless of hysteresis of air system, the main factor that influences dynamic response of fuel cell is diffusion concentration polarization, which restricts the change rate of stack current.

不考虑空气系统的时间滞后，影响电池动态响应时间的主要因素为扩散浓差极化，它限制了电流的变化率。

youdao

The change of exchange rate is an important factor that affects export.

汇率变化是影响出口贸易的重要因素。

youdao

The main factor in the slow rate of change probably has had to do with the structure and culture of the electric industry.

FORBES: The Economist: Innovation Almost Dead. Perhaps Not So In Electricity