基本解釋重復(fù)頻率發(fā)生器詞組短語短語Repetition -rate electron beams generator 重復(fù)頻率電子束發(fā)生器repetition-rate generator更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)重復(fù)頻率發(fā)生器