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 law of cancer biochemistry癌生化第一规律first-generation microcomputer[计] 第一代微计算机first-past-the-post system给某政党在议会中一席位的制度first order derivative titration一级导数滴定First horse race betting licence首个赛马投注牌照First Destination Transportation第一目的地运输first-degree erythematous dose一级红斑剂量first order shearing deformation一阶剪切变形First Service From First Service头车服务由First class edible bamboo fungus一品竹荪