differential curve

例句：

1. 1. The differential curve of the function is a straight line.
   函数的差分曲线是一条直线。
2. 2.The differential equation describes how the rate of change of a quantity changes with respect to time.
   微分方程描述了某量随时间变化的速率变化情况。
3. 3. The differential equation solution provides an approximation for the value of the function at a specific point in time.
   微分方程解提供了函数在特定时刻值的近似值。