time varying sinusoidal gradient

例句：

1. 1.The time-varying sinusoidal gradient is a crucial factor in the analysis of dynamic systems.
   时间变化的正弦梯度是分析动态系统的关键因素。
2. 2. The sinusoidal gradient was used to simulate the behavior of the system under different conditions.
   正弦梯度被用来模拟系统在不同条件下的行为。
3. 3.The gradient is calculated using the formula: dV/dx = -kx^2, where k is the gradient coefficient and x is the position along the x-axis.
   梯度的计算使用公式: dV/dx = -kx^2，其中k是梯度系数，x是沿x轴的位置。