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。
We don’t try to time the market. We try to buy things that are cheap.
The truth is rarely pure and never simple.
By nature, all things are common.
创新不仅仅是创造新产品；而是重新构想我们如何解决老问题。
真理，通过理性思考和观察自然得出。