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-to-date type最新式upgrading precision提高精度up-count register上序计数寄存器up-beat nystagmus上视性眼球震颤updatable microfilm可更新缩微胶片up-and-down rod上下联杆,直立杆up-weighing method上称重法up-to-date style最新的up / down counter升降计数器up-and-down line到发线