The greatest wisdom is to know that you know nothing.
行业与环保人士之间的合作不仅是可能的，而且是必不可少的。
The most valuable resource we have isn't in the ground - it's the people who show up every day to do the work.
Laughing is good for you if you don't kill yourself.
The key to successful investing is to have a long-term perspective and to stick to your investment plan.