气候变化不是对森林的未来威胁，而是现在正在运作的电锯。
Climate change isn't a future threat to forests—it's the chainsaw at work right now.
You are never too old to set another goal or to dream a new dream.
In the quest for understanding the fundamental nature of reality, we must be prepared to question everything we think we know.
科学的乐趣在于旅程，而不仅仅是终点。
国君自以为神圣聪明，而不去咨询官吏，自以为国家安定强大，而不注重防守，周围的邻国图谋侵略他却不知道戒备。