基本解釋[經(jīng)濟(jì)學(xué)]優(yōu)先股股息保償率詞組短語短語preferred stock dividend coverage ratio 優(yōu)先股股息保償率preferred stock dividend coverage更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)優(yōu)先股股息保償率