Fallea法莱亚fallv.落下；倒下；来临n.秋天；落下；瀑布fall behind with one's rent交不上房租Fallopian tubes obstruction输卵管阻塞falling-film eavaporation降膜蒸发falling- film evaporation降膜蒸发fall a sacrifice to avarice成为贪婪的牺牲品falling rock warning device落石警报装置Fall into the same category属于同一范畴fall asleep over one's workfall under sb's observationfalling-sphere viscometer沉球式粘度计