我们的遗产将由我们今天如何对待森林来定义。
The art of being wise is the art of knowing what to overlook.
2004年9月13日，81岁的杨振宁在清华大学开始为本科生讲授普通物理。他说
Children understand more than we often give them credit for.
The only way to keep improving is to keep pushing yourself.
"The best way to forget something is to remember it."