短语词组短语timing sign -off 时序终止Launch Sign -Off 投产验收sign -off 广播完毕;签署同意;签收;签证Single Sign -Off 单点登出sign sb off 开假条You Sign It Off 你签字就自己FSFinal Sign -off 最终验收Deliverable Sign -off 项目交付项目验收LSLaunch Sign -Off 投产验收 返回 sign off