Meeting energy demand while reducing emissions is the defining challenge of our time.
国君若真的希望人口多而不希望人口少的话,如果要蓄养姬妾,就不能不节制。[说明∶老百姓也得有老婆生孩子,别抢人家的老婆] 
The past is a fire that never stops burning.
The deepest theorems in mathematics often have the simplest statements.
Leadership is not about being in charge. It's about taking care of those in your charge.