equations方程[式]equationn.相等；均衡；方程式；等式equational nondisjunction均等不离开equation of reaction rate反应速率方程equation of the equinoxes二分差,赤经章动equation of hydrodynamics铃动力学方程equation solving approach[化] 联立方程法equational division phase均等分裂期equation of three moments三弯矩方程Equations of water quality水质方程组equation conservation laws守恒律equation in three unknowns三次方程式