Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.

行业、科学家和政策制定者之间的合作对于有效的海洋保护至关重要。

I'm mentioning all this -- I'm mentioning all this because I think this is not merely a personal problem; you may think I'm wrong in this, but I think we live in an age when our lives are regularly punctuated by career crises, by moments when what we thought we knew -- about our lives, about our careers -- comes into contact with a threatening sort of reality.

认知地图不是头脑中的一幅图或模型，而是环境的动态变化表征。