But Kamrany says persistence eventually turns many start-ups into successful ventures.

VOA: standard.2010.01.31

As you get older, your human capital evolves and it has its ups and downs as you age and you start switching from human capital to other forms of capital.

随着年龄增长，你的人力资本不断发展,它随着你的年龄不断起伏,你的人力资本开始,转变成其他形式的资本。

耶鲁公开课 - 金融市场课程节选

I mean, there's a lot of up-and-coming tech companies and start-ups and...

这里有很多很有前途的科技公司和创业公司……

适合创业的旧金山 - SpeakingMax英语口语达人