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。

教育不是为生活做准备；教育本身就是生活。

The best experiments often come from simple ideas and careful observation.

领导力不在于掌控，而在于照顾你所负责的人。

But the old man thought only of his steering and his great tiredness. He had gone out too far and the sharks had beaten him. He knew they would leave him nothing but the stripped skeleton of his great catch.