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。

"The past is what you remember, imagine you remember, convince yourself you remember, or pretend to remember."

The concept of progress must be grounded in the idea of catastrophe.

Leadership is not about being in charge. It's about taking care of those in your charge.