ultrabookn.超极本ultraadj.超；过激的；极端的n.过激论者；急进论者ultra-high molecule polyethylene超高分子量聚乙烯ultra-high frequency transmitter超高频发射机Ultra-high speed milling machine超高速铣床ultra-low temperature ball valve超低温球阀Ultra-purified lithium carbonate超纯碳酸锂ultra-low frequency oscilloscope超低频示波器ultrasound computerized tomography超声计算机断层摄影术ultra-high strength copper alloy超高强度铜合金ultrafine grain/nanocrystalline超细晶／纳米晶ultra low molecular weight heparin超低分子量肝素