变老的好处之一就是你可以畅所欲言而不必担心后果。

Combinatorics is like the art of counting without actually counting.

Every tree tells a story; our job is to make sure it's a story of renewal, not destruction.

荒野是一个美丽而危险的地方。要生存，你必须尊重两者。

领导力就是做出艰难的决定并坚持到底。