空防合一的体制: adopt a system of combining aviation with ground-to-air defense forces
摧毁: (用强大的力量破坏) destroy; knock out; smash; wreck 短语和例子摧毁敌人的阵地 destroy the enemy positions; 摧毁旧的国家机器 smash the old state machinery; 摧毁烃化 [化学] destructive alkylation; 摧毁射击 destructive fire