短语词组短语build -down 降落Too bad build -down 糟糕的降落Pressure build -down test 压力降落试井build down proposal 逐步减少核力量的建议Build Down Period 还箱期build down pericd 还箱期build down clause 还箱条款Break Down Build Up 破坏Tear Down And Build 拆建 返回 build down