anti-aircraft defence

例句：

1. 1. The city's anti-aircraft defences are state-of-the-art.
   城市的防空防御是最先进的。
2. 2. The aircraft carrier is equipped with an array of anti-aircraft defences.
   航空母舰配备了一系列的防空防御设备。
3. 3. The country's defense minister has been criticized for his lack of effective anti-aircraft defences.
   该国国防部长因缺乏有效的防空防御而受到批评。