The key to effective leadership today is influence, not authority.
当今有效领导的关键在于影响力,而非权威。
Every ton of coal we extract must create maximum value with minimum environmental impact.
The only way to understand painting is to look at it for a long time.
国家是理性的行为者,在无政府状态的国际体系中寻求最大化其权力和安全。