Ultra wideband, a radio communications technology for the transmission of signals over a very broad range of frequencies, typically using very low-energy pulses with a duration of a nanosecond or less.
Ultra wideband.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。