二阶动力方程
second-order dynamic equations
二阶动力学系统
second-order dynamic system
second-order dynamic systems
second-order dynamical system
二阶动态电路
2th-order dynamic circuits
second-order dynamic circuit
二阶动态滑模控制
Second order dynamical sliding mode control
光滑二阶动态滑模
smooth second-order dynamic sliding mode
牛顿第二运动定律
Newton’s second law of motion
一阶二动差法
first-order second-moment approach
一阶二阶逼近
first second order approximation
登阶运动
stair stepping exercise training
简阶运动[的]周期
period of simple harmonic motion