firsthandadj.直接得来的;第一手的adv.直接地
firstadj.第一的;最初的adv.首先;第一n.最初;(序数词)第一
first distribution of national income国民收入初次分配
first-in-not-used-first-outn.先进不先出
First-order-second-moment method一次二阶矩法
First Article Inspection Software Test首次检验软件测试
First human face transplant successful换脸成功
first article configuration inspection初样概略检验
First Polish-Swedish War for Livonia波瑞第一次利沃尼亚争夺战(1600-1611)
first-order temperature compensation一阶温度补偿
first A-V junctional escape interval第一次房室交接处逸搏间期