1. 重案行动组：418、活火熔城.Volcano.1997 | 419、重案行动组.Bulletproof.1996 | 420、萨尔瓦多.Salvador.1986

2. 防弹的：bulletin 公告 | bulletproof 防弹的 | bullfight 斗牛

1. make bulletproof

    e.g. bulletproof the car

1. not penetrable by bullets

    e.g. bulletproof glass
           bulletproof vest

2. without flaws or loopholes

    e.g. an ironclad contract
           a watertight alibi
           a bulletproof argument

    Synonym: unassailableunshakablewatertight