连续性方程 continuity equation ; [数] equation of continuity ; equation fo coninuity ; Principle of Continuity

刚性方程 stiff equation ; stiff differential equation

线性方程 [数] Linear equation ; simple equation ; Linear equs ; Linear equations and inversion

线性方程式 Linear Equation ; linear r equation

相容性方程 compatibility condition ; compatibility equation

连续性方程式 continuity equation ; equation of continuity

二元线性方程 linear equation in two unknowns ; binary linear equations

特性方程式 characteristic equation ; equation characteristic