abbr.acknowledge 承认，acknowledgement 承认，acknowledgment 承认，acknowledged 承认的...

ack的音标：...

The ack - ack guns started immediately.高射炮立即开始发射.In our dearth of ack - ack guns all sorts of contrivances were used.在缺少高射炮的时候,我们利用了各种各样的巧妙方法.ACK ! Bug spray? Why do we need bug spray?啊? 杀虫剂? 我们要杀虫剂干什么?...