Guardon.瓜尔多guardv.看守；守卫；保卫；提防n.警戒；哨兵；防护装置；警卫；【体】后卫guarded switch保险开关guard interval保护间隔guard a secret保守秘密guard catalyst保护催化剂guarding outfit警卫用具guard potential保护电位guard a mystery保守秘密guard frequency防护频率guardhouse n.警卫室;guard personnel[法] 警卫人员