variable rate mortgage的用法和樣例：
例句
- This is a variable rate mortgage.
這是可變利率抵押貸款。 - His research using more recent data finds that default rates skyrocket when subprime or option adjustable-rate mortgage borrowers owe more than their houses are worth.
他利用較近期的數據研究發(fā)現，當次級或者選擇性可調利率抵押貸款者的欠款超過(guò)房屋價(jià)值時(shí)，貸款拖欠率就會(huì )飆升。
