发现的快乐是这些年来一直激励我的动力。
The joy of discovery is what keeps me motivated after all these years.
The true value of oil lies in its ability to transform economies and societies.
The path to a sustainable energy future requires a balanced approach that considers economic, environmental, and social factors.
我们知识的边界就是我们好奇心的前沿。
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。