prime

最佳部分, 初期, 全盛期

a number that has no factor but itself and 1; the second canonical hour; about 6 a.m.; the time of maturity when power and vigor are greatest

主要的, 最初的, 根本的

加油启动, 灌注, 填装

insert a primer into (a gun, mine, or charge) preparatory to detonation or firing