鲜艳的花朵不可能在离开花枝之后,还能长久鲜艳;足以吞下船只的大鱼也不可能在离开水源之后,还能活命。
真正的可持续性是与自然的和谐。
The beauty of mathematics is that it allows us to see patterns and structures in the world that are not immediately obvious.