zhè cì / yǎn xí / zhǔ yào / cè shì / jūn duì / de / hé fáng yù / néng lì / què bǎo / guó jiā / ān quán

这次演习主要测试军队的核防御能力，确保国家安全。

This exercise mainly tests the military's nuclear defense capability to ensure national security.