解释：大部分鸟类都是雄性的，而雌鸽却是雌性的，说明了鸟类性别的特殊性。
Do not feel envious of the happiness of those who live in a fool’s paradise, for only a fool will think that it is happiness.
Greatness is not this wonderful, esoteric, elusive, god-like feature that only the special among us will ever taste. It's something that truly exists in all of us.
Every frame counts in telling the story.
The writer’s life is a life of solitude.
数学家是能在定理间找到类比的人；更好的数学家能在理论间看到类比；而最优秀的数学家能注意到类比之间的类比。
"In every equation, there is a story waiting to be told."