激发伊隆·马斯克创办实业的中心问题，并不是简单地为了赚钱，而是对别人有用处（be useful to other people.）

所有伊隆·马斯克商业投资背后的根本问题似乎是：“我能做些什么才是真正有用的？”（The underlying question behind all of Musk's business ventures seems to be: "What can I do that would actually be useful?"）

The central question that inspired all of Elon Musk's ...

https://www.fxncc.com/the-central-question-that-inspired-all-of...

The central question that inspired all of Elon Musk's ...

worldnewsnetwork.co.in/technology/the-central-question-that...

The central question that inspired all of Elon Musk's businesses

https://www.cnbc.com/2018/06/22/the-central-question-that-inspired-all-of-elon-musks-businesses.html?yptr=yahoo