物理学的目的不是掌控自然,而是理解自然。
林业的未来在于平衡经济需求与生态责任。
我愿你快乐,即使你的快乐不再是因为我。
It seems to me that if you or I must choose between two courses of thought or action, we should remember our dying and try so to live that our death brings no pleasure to the world.