secondness第二性
secondadj.第二的;次等的;再一个的num.第二n.片刻;秒adv.第二;其次v.支持;赞成;附和;调派
Second stage attitude control engine二级姿控发动机
second generation cordless telephone第二代无绳电话
Second Assistant Bartender Zhang Yan第二副调酒师张岩
second generation wavelets transform第二代小波
second-stage hydrogenation reactor二段加氢反应器
second order boundary value problems两点边值问题
second language and foreign language第二语言和外语
second-order sufficiency condition二阶充分条件