在所有时代，困扰人类并给他们带来最大灾难的大问题，不是世界上是否有权力，也不是权力从何而来，而是谁应该拥有它。
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
In times of crisis, true leadership is measured by actions, not words.
没有力量的正义是徒劳的，没有正义的力量是暴政。
The climate system is extraordinarily complex, and our understanding of it is still evolving.
有时候，活下去的唯一方法就是不断前进。