Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them - and then, the opportunity to choose.

世界是一个非常复杂的地方，并不总是容易理解我们周围发生的事情。

跨行业、跨国界的合作是解决全球粮食安全挑战的关键。

数学思想的真正考验是它能否激发更多的问题。

The real competition is not between companies, but with yourself.