决定胜负的不是狗的体型大小，而是狗的战斗意志。
It's not the size of the dog in the fight, it's the size of the fight in the dog.
不管你认为你能，还是你认为你不能——你是对的。
There are no eternal facts， as there are no absolute truths.
"In war, the first casualty is truth."
The only limit is the one you set for yourself.
我们要加强国际合作，共同应对能源安全和气候变化的挑战。