基本解释[经济学]零息票可转换担保证券零息票可转换担包管券词组短语短语Zero -Coupon U Convertible Collateralized Securities 零息票可转换担保证券zero-coupon convertible collateralized securities更多词组专业释义经济学零息票可转换担保证券零息票可转换担包管券