slumpv.大幅度下跌；猛然瘫坐；使倒下n.暴跌；低潮状态；(土地)下沉slump mechanism坍塌机理slump down into掉入slump structure塌滑构造,滑移构造slump turbidite滑塌浊流沉积slump retaining坍落度保持slump in demand需求急剧下降slumping loessal湿陷性黄土slump resistance抗塌陷性slump incoherent松散滑塌slumping economy急速衰退的经济