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 pressure limit压力上限upper half-bearing上半轴瓦upper limit of mining开采上限upper dimension bound上维界Upper-river channel水上分流河道upper-income family收入多的家庭upper-level payment上层支付upper semi-continou上半连续upper Cambrian series上寒武统upper sideband filter上边带滤滤器