ultrabookn.超极本ultraadj.超；过激的；极端的n.过激论者；急进论者Ultrasound integrated back scatter超声背向散射积分ultrafine colloidal antimony oxide超微细胶体氧化锑Ultra-violet absorbance spectrum紫外吸收光谱ultra-low permeability reservoir特低渗透油藏ultra-violet fluorescence method紫外荧光法ultra-fine silver emulsion plate超微粒银盐干版ultrasound transmitting transducer超声波发射换能器ultra-short radius radial system径向井ultra-fine grain metal materials超细化台金Ultra-Small Electronics Research超小型电子研究

1. The plastic blocks infrared rays from sunlight.
   这种塑料可以阻挡阳光中的红外线。
2. What are infrared and ultraviolet rays?
   什么是红外线和紫外线？