expandorn.扩张器expandv.使 ... 膨胀；详述；扩张；增加；张开expandable implant可扩张假体expanding features扩展特征expanding waterway内窄外宽的水槽Expanding Activity延伸活动expanding workload日益增多的工作量expanding property发泡性expanding universe膨胀宇宙expanding diameter扩径expanded verb form动词扩展形式Expanding veloeity膨胀速度