基本解釋[經(jīng)濟(jì)學(xué)]杠桿作用假說詞組短語短語Optimal Leverage Ratio Hypothesis 杠桿比率假說The Leverage Hypothesis 杠桿假說leverage hypothesis更多詞組專業(yè)釋義經(jīng)濟(jì)學(xué)杠桿作用假說