The most important political development of the last half century has been the spread of liberal democracy around the world.
過去半個世紀最重要的政治發(fā)展是自由民主在世界范圍內(nèi)的傳播。
科學(xué)是一段旅程，而非終點。
The stage is where I feel most alive, connected to the energy of the people.