要理解心理学，就要在自然环境中观察行为。

The rise of China is the most significant geopolitical event of the 21st century.

Innovation doesn't happen by accident; it requires intentional investment in people and ideas.

能克服自己的私欲，什么祸害对你都是无可奈何的了。

我们必须始终努力做正确的事，即使这很困难。