收音机: radio...
不起眼: unremarkable, nothing out of the ordinary...
各个: every, various, separately, one by one...
打算: to plan, to intend, to calculate, plan, intention, calculation...
多元: poly-, multi-, multielement, multivariant, multivariate (math.)...
长度: length...
反问: to ask (a question) in reply, to answer a question with a question, rhetorical question...
担任: to hold a governmental office or post, to assume office of, to take charge of, to serve as...
全程: the whole distance, from beginning to end...
创新: innovation, to bring forth new ideas, to blaze new trails...
