upper bar高杠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 Silurian series上志留统upper-level problem上级问题upper frequency limit频率上限upper lateral bracing上部横向支撑upper quadrant signal上向臂板信号机upper broadcast state上播状态upper sieve extension上筛的延长部分upper half crank case上半部曲柄箱upper palea absent.上面内稃无。upper-surface brake上翼面减速板