UPEn.单总线奇偶错
upadv.向上;起来;上升;往上prep.向上adj.向上的;上行的n.上升v.上升;增加
up-and downwelling升降流
Up semi-continuous上半连续
up-and-over door翻门
up to one's opinions按照自己的意见
up to one's eyeballs
up/down converter上/下变频器
updating maintenance更新维护
Up-Bottom approach自上而下
up-down phenomenon起伏现象
upflow solid reactor升流式固体反应器