The true cost of oil isn't just the price per barrel—it's the environmental and social impact.

The market is a great teacher, but it charges a high tuition.

专注和简单一直是我的秘诀之一。简单可能比复杂更难做到，你必须努力理清思路，从而使其变得简单。

我很幸运能做我喜欢的事情。

You are never too old to set another goal or to dream a new dream.

追求知识是一生的旅程，而发现的喜悦是其最大的回报。