人类起源的故事仍在书写中。
The story of human origins is still being written.
The past is a kind of shadow which is always there, whether you choose to ignore it or not.
旅行对偏见、固执和狭隘是致命的。
You must not think that what is hard for you to master is humanly impossible; and if it is humanly possible, consider it to be within your reach.