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 transition percent point前跃百分点
First Generation of Corn Borer一代玉米螟
first-order elastic analysis一阶线弹性分析
first-derivative spectroscopy一阶导数光谱法
first order optimization method一阶分析法
first-come-first-serviced先来先服务
First Sortie after Ground Alert地面待命后起飞的第一架次
first round hitting probability首发命中率