名词 uppercut:

1. a swinging blow directed upward (especially at an opponent's chin)

upper arm上臂,上腕upperadj.较高的；上面的；上部的n.鞋帮；上铺n.兴奋剂；令人兴奋的经历upper level organization上层组织upper Pleistocene series上更新统upper lethal temperature致死温度上限upper semicontinuous map上半连续映射upper side band spectrum上边带频谱upper break-even point保本点上限Upper Information System高空信息(情报)系统UPPER COVER OF FUEL TANK油箱上盖upper boxing-dimension上盒维数upper-leverl threshold上阈