To understand psychology, observe behavior in its natural context.
要理解心理学，就要在自然环境中观察行为。
Every tree we plant today is an investment in tomorrow's clean air and healthy ecosystems.
The ability to associate depends, in turn, on the degree to which communities share norms and values and are able to subordinate individual interests to those of larger groups.
The future of steel lies in sustainability and innovation.
Innovation is not just about new products; it's about rethinking how we do everything.
A mathematician is a device for turning coffee into theorems.