对做好自己的事感到满足，不必理会别人如何议论你。
Don’t take it personally when someone turns you down. Assume they are like you: busy， occupied， distracted. Try again later. It’s amazing how often a second try works.
The future of coal lies in cleaner technologies and smarter resource management.
The world is full of obvious things which nobody by any chance ever observes.
Men are born ignorant， not stupid； they are made stupid by education.