Most countries try to preserve their international credit rating in order to secure necessary loans.大多数国家都努力维护国际信用等级以确保得到必要的贷款。People are jumping to purchase homes and lock in affordable mortgage rates before they increase.人们踊跃购房，希望在按揭利率上升前确保得到支付得起的低利息。If they want to buy the house, make sure you get the offer in writing.如果他们想买这房子，你要确保得到书面出价才行。