ultrabookn.超极本ultraadj.超；过激的；极端的n.过激论者；急进论者ultra-short-lived radionuclide超短寿命放射性核素ultra-high frequency electricity超高频电ultra high voltage DC transmission特高压直流输电ultra high strength aluminum alloy超高强铝合金Ultra-low--carbon -bainite超低碳贝氏体ultra-high-pressure processing超高压杀菌ultra-high frequency antenna UHF超高频天线ultra-thin whitetopping pavement超薄水泥混凝土路面ultra-violet breathing apparatus水下呼吸器ultra-short time film evaporator[化] 离心式瞬时薄膜浓缩器