当且仅当所有投资者都持有均值-方差有效的投资组合时，市场组合才是有效的。

没有了目的，生活便郁闷无光。

精准农业不是为了取代农民——而是为了用更好的工具赋予他们力量。

要做出不错的东西，要大胆去做它。要想做出好的东西，需要一次又一次去做。做好东西的秘诀在于重新去做。

活着就是拥抱未来的不确定性。

If a writer doesn't generate hostility, he is dead.

Cheerfulness is the best promoter of health and is as friendly to the mind as to the body.

Technology can revolutionize aquaculture, but only if applied with care and foresight.

Combinatorics is the art of counting without counting.