常見例句雙語例句On the demand side, the Federal Reserve held down mortgage rates by buying up mortgage-backed securities, while Congress offered a generous tax credit to qualifying buyers.在需求方面，美聯(lián)儲通過購買按揭證券壓低住房抵押貸款的利率，同時(shí)國會慷慨地為具有資格的買家提供稅收減免。 返回 qualifying reserve