基本解釋[經(jīng)濟(jì)學(xué)]脈動(dòng)基頻詞組短語(yǔ)短語(yǔ)fundamental formula ripple frequency 波紋基頻fundamental ripple frequency更多詞組專(zhuān)業(yè)釋義經(jīng)濟(jì)學(xué)脈動(dòng)基頻