词汇	upgrading and reforming
释义	upgrading and reforming 升级改造
随便看	Air Defense Requirement air defense restricted area air defense reticle air defense rocket air-defense rocket air defenses air defense scheme Air Defense School air defense section Air Defense Sector Air Defense Service Medal Air Defense Ship Air Defense Simulation Air Defense Simulator Air Defense Simulator Evaluation Air Defense Software Committee Air Defense Squadron air-defense station Air Defense Support Center Air Defense Suppression air defense suppression missile Air-Defense Suppression Missile Air Defense System Management Office air-defense systems Air Defense Systems Command