equation of time时间等式；
时间方程；
双语例句
1.The covariant equation of plane motion body in curved space - time is studied.x09
研究弯曲 时空 中平面运动刚体的动力学协变方程.
2.The governing equation of a gear system with time - varying meshing stiffness is established.
建立了具有时变啮合刚度的二级齿轮系统的动力学方程式.