upper nut上螺母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 semicontinuous function上半连续函数upper eyelid skin flaccidness上睑皮肤松弛upper slide-shuttering form上行式移动模架upper opening of esopho-gus嗌Upper Respiratory Tract Flora上呼吸道菌群upper and lower motor lesions上位和下位运动损伤Upper and Lower Approximation上下近似upper urinary tract infection上尿路感染Upper reaches of Yellow River黄河上游Upper approximation reasoning上近似推理

1. The plates on the upper shelf were beyond my reach.
   上层架子上的盘子我伸手拿不到。
2. He locked his diary in the upper drawer.
   他把日记锁在上层抽屉里。