The mind is a complex system that can be analyzed at multiple levels.
心灵是一个可以在多个层次上分析的复杂系统。
The anarchic nature of the international system forces states to compete for power.
Quality is not a chance; it is a choice.
在一个快速变化的世界里,适应能力是最终的竞争优势。
"The marks humans leave are too often scars."