基本解釋后償債權股額詞組短語短語convertible subordinated uecured loan stock 可轉換股的次級無抵押債權股額convertible subordinated unsecured loan stock 可轉換股的次級無抵押債權股額subordinated loan stock更多詞組專業(yè)釋義經(jīng)濟學后償債權股額