幸福的秘诀是：尽量扩大你的兴趣，对感兴趣的人和物尽可能友善。
The interplay between local and global phenomena is a recurring theme in number theory.
What good's an opinion if you can't change it?
过得最充实的人不是年龄最大的，而是经历最丰富的人。
Forests are the lungs of the earth, and we must protect them with the same urgency as our own health.
The best way to overcome fear is to face it.