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 critical velocity上临界流速upper eyelid relraction上睑退缩upper- lower solution上下解upper-air circulation西北地区upper arm circumference上臂围upper protective layers上保护层uppermost complete deck最上全通甲板upper cut off frequency上截止频率Upper computer software上位机软件upper supporting roller上托辊