Every material has a memory, and every action leaves a trace.

La imaginación es el arma más poderosa que tenemos contra la realidad.

The true value of a forest cannot be measured in board feet, but in the breath of the planet.

The joy of mathematics is in the discovery of patterns and the understanding of their implications.

The real challenge is not in solving the equations, but in understanding what the solutions mean.

关键在于不断进步，持续努力。