first cut粗錾纹,粗切削,掏深槽firstadj.第一的；最初的adv.首先；第一n.最初；(序数词)第一First school year first semester第一学年第一学期first branch of trigeminal nerve三叉神经第一支first order proportional element一阶比例元件first-in first-out buffering先进先出缓冲技术first-person mental simulation第一人称心理模拟First Order Second Moment method一次二阶矩法First deserve and then desire.先做到受之无愧，而后再邀功请赏。first order system with equality带等词的一阶系统first order autoregression model一阶自回归模型first-generation only children第一代独生子女