sa1nbu4zhi1(1)[to know neither the beginning, the middle, nor the end of a matter]∶指对开头、中间到结尾一无所知(2)[complete ignorance]∶指什么都不知道一问三不知(3)[in a hurry]∶匆促间(4)[suddenly]∶突然三不知逢着贵客,我两只手忙加额
接受
