人类留下的痕迹往往是伤痕。

One never notices what has been done; one can only see what remains to be done.

The past is a shadow, always following, but never catching up.

The best solutions often come from those who work closest with the animals.

The best way to predict the future is to invent it.

The only way to discover the limits of the possible is to go beyond them into the impossible.

梦想的意义在于不断追求。