"We all have our time machines. Some take us back, they're called memories. Some take us forward, they're called dreams."
我们都有自己的时间机器。带我们回去的叫回忆,带我们前行的叫梦想。
真正的进步既要衡量经济增长,也要衡量生态系统的健康。
"History is a nightmare from which I am trying to awake."
我们银河系的中心是一个极端物理学发生的迷人地方,能研究它是我的荣幸。