一本好书是一次伟大的冒险。
"A great book is a great adventure."
You can't let praise or criticism get to you. It's a weakness to get caught up in either one.
The most exciting breakthroughs of the 21st century will not occur because of technology but because of an expanding concept of what it means to be human.
The balance between energy needs and environmental protection is the challenge of our time.
一个没有记忆的国家是没有未来的国家。
