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。
Success is not final, failure is not fatal: It is the courage to continue that counts.
The work of art is a trace of the sacred.
改革需要勇气，但更需要智慧。
天空是极限，对吧？