单词 ack-ack 释义 ack-ack, a. and n.|kk|Also Ack-Ack.[Redupl. form of ack, repr. A.A. (see A III).]A. adj. Anti-aircraft. B. n. Anti-aircraft gun, gunfire, regiment, etc.1939Collier's 2 Dec. 19/1 One unscheduled move and the machine would have been blown...