过去是你记得的、想象你记得的、说服自己记得的或假装记得的东西。
"The past is what you remember, imagine you remember, convince yourself you remember, or pretend to remember."
正如几何学最自然的起点是数学点，在观察和自然历史中采用同样的方法也最真实、简单且富有教益。
The future of leather lies in the balance between tradition and technology.
The only way to do something in depth is to work hard.