The reason the mafia thrives in countries where it's hard to write legal contracts-- let's say some new parts of the former Soviet Union or some parts of Africa the reason the mafia thrives in those environments, is that it substitutes for the law and enforces both legal and illegal contracts.

黑恶势力在那些,书面协议不受保护国家不断壮大,比如前苏联新成员国 或者非洲,为什么黑恶势力在这些地方发展壮大,因为这是法律强制力的补充,它维系所有合同,不管是不是合法的

耶鲁公开课 - 博弈论课程节选

I mean, this is a really great place to do business, because almost regardless of what it is you do,

这里也是一个发展业务的好地方，因为不管你现在要做什么，

经济危机也能避开 - SpeakingMax英语口语达人

I think the San Francisco economy is probably one of the top economies in the country right now.

我认为旧金山是美国经济发展最繁荣的地方之一。

适合创业的旧金山 - SpeakingMax英语口语达人