1. The ack - ack guns started immediately. 高射炮立即开始发射。
2. 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。
3. Most TCP sessions start with one endpoint sending a SYN packet, to which the other party responds with a SYN-ACK packet. 我们知道,绝大多数的TCP会话的建立,都是通过一端先发送一个SYN包开始,另一方则回发一个SYN-ACK包的过程。
英英解释
n.
1. artillery designed to shoot upward at airplanes