ultraismn.激进论；极端主义ultraadj.超；过激的；极端的n.过激论者；急进论者ultrashort-lived nuclide超短半衰期核素ultra-high-speed pulse超快脉冲ultra-pure bearing steel超纯轴承钢ultra-filtrated membrane超滤膜ultrafine-grained copper超细晶铜ultra-violet catastrophe紫外灾变ultra fine stationary grid超细栅格固定滤线栅Ultra low content spraying超低容量喷雾Ultra-linguistic factors超语言因素Ultra-high cydes fatigue超高周疲劳