Sustainable development requires balancing economic growth with ecological protection.

洛丽塔，我生命之光，我欲念之火。我的罪恶，我的灵魂。洛一丽一塔。

States are rational actors that seek to maximize their power and security in an anarchic international system.

不要为成功而努力，要为做一个有价值的人而努力。