地球的历史镌刻在它的岩石中。
"We are all prisoners of our own experiences, and yet we can never fully understand them."
解释:看到兔子再回头唤猎狗,还不算太晚;跑掉了羊再去修补羊圈,也不算太迟。
The only limit to our understanding of the universe is our imagination.
给一个人火,他能温暖一天;但把他点燃,他能温暖余生。