milestone:some important point in your life 里程碑

social security 社會(huì)保障the money that you pay in taxs when you work

tap into money :meas that take money from area 動(dòng)用錢

marked different:means there is a noticeable different/a significant different 顯著差異

a sum of sth meas an amount of sth

a pretty big sum of money=a pretty big amount of monry 相當(dāng)大的已一筆錢

entrepreneurial：創(chuàng)業(yè)

renovate:翻新

tenant：the person who rents a building 租戶

interest 這里指利息

real estate 房地產(chǎn)