Sustainability isn't a choice anymore—it's a responsibility we owe to future generations.
可持续发展已不再是一种选择，而是我们对后代的责任。
有疑问时，就说真话。
一个只能被儿童欣赏的儿童故事根本不是一个好的儿童故事。
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.