一: one阶: steps; stairs匀: even滑: slippery; smooth一阶: first order; first-order; single(-)order不均匀滑移: inhomogeneous glide隐式匀滑: implicit smoothing匀滑转换: cross fade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一阶植: first-order value一阶值: first-order value一阶求导, 一阶求微: first derivation匀滑折射率分布光纤: uniform index profile fiber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