time varying gradient

例句：

1. 1.The rate of change in the time-varying gradient is crucial for understanding the system's behavior.
   时间变化的梯度变化率对于理解系统行为至关重要。
2. 2. The gradient of the time-varying function is a key factor in predicting the system's behavior.
   时间变化的函数梯度是预测系统行为的关键因素。
3. 3. The gradient of the temperature distribution across the region is an important consideration when designing thermal systems.
   区域温度分布的梯度是设计热系统时需要考虑的重要因素。