一个人的错误是他发现的门户。

数学的目标是使简单的复杂化，使复杂的简单化。

A tannery's waste stream tells the story of its ethics more clearly than any mission statement.

Sustainability isn’t a trend; it’s the only way forward.

The key to trading success is emotional discipline.

每个出口都是另一个地方的入口。