stepping stone垫脚石

1)Good habits are a stepping stone to success.(好习惯是成功的垫脚石，habits是复数)

2)例子: My stint as an entry level employee served as  a stepping stone to present promotin.(正是刚工作时的那段经历让我得到了成长现在才得以晋升)

    场景: 今天跟同事聊起刚工作的时光。