First ald急救firstadj.第一的；最初的adv.首先；第一n.最初；(序数词)第一first-ready-first execute[计] 先就绪先执行first-generation assessment第一代评估first derivative spectrometry一阶导数光谱法first-fit-decreasing rule首次适合下降规则first-aid repair technology抢修技术First draft of final paper.期末报告的初稿。first division nondisjunction第一次[减数]分裂不分离first come first served basis先到先服务的原则first transition mesial point前跃中间点first secretary of an embassy大使馆一等秘书