永远不要认为战争不是犯罪，无论它多么必要或正当。

The essence of mathematics lies in its freedom.

The great powers are always searching for opportunities to gain power at the expense of their rivals, and they will use force if they think it will profit them.

We have a responsibility to provide reliable and affordable energy while addressing climate change.

领导力在于以同理心和远见做出艰难的决定。