攒qian速度永远赶不上房jia上涨的速度.
The speed of saving money might never catch up with that of increasing house price.
如果30年还完dai款,利xi都滚出一套房zi来了.
The interest on interest for mortgage(housing loan) could buy the lender another s in 30 years can buy another house if he/she could repay the loan in/within(2选1) 30 years.
供参