air attack

The fort cannot be defended against an air attack.

这座要塞遭到空袭法防御。

North American Aerospace Defense Command (NORAD) - a binational command involving the United States and Canada which provides warning of missile and air attack against both of its member...

航空防御指挥部-国和加拿大的合指挥部，提供导弹发射和空袭的警报，保卫空，并提供空中防御。