一: one阶: steps; stairs植: plant; grow; cultivate一阶: first order; first-order; single(-)order第一阶: prime一阶；一级: first order一阶的: single order一阶法: first-order method一阶谷: first order valley一阶矩: first moment一阶条: first―order condition一阶值: first-order value一阶求导, 一阶求微: first derivation初指令, 一阶: first order第一阶段: first phase; first stage; firstphase第一阶段的: first stage附加一阶矩: additional first moment前一阶段: the preceding stage上一阶段: upper stage向一阶导数: u first derivative一阶闭合: first-order closure一阶标架族: family of frames of order one一阶不连续: discontinuity of first order一阶差别图: first order difference picture一阶差分: first difference; first order difference
