可持续性不是一种选择；它是我们对后代的责任。
Sustainability is not an option; it's a responsibility we owe to future generations.
The hardest thing to explain is the glaringly evident which everybody had decided not to see.
Old minds are like old horses; you must exercise them if you wish to keep them in working order.
一件事实只要超过一个人相信，便不再是真相。