我想起了其他的浮泛在生与死与爱以及被遗忘的川流上的的时代，我便感觉到离开尘世的自由了。
I think of other ages that floated upon the stream of life and love and death and are forgotten,and I feel the freedom of passing away.
"A good book is the best of friends, the same today and forever."
In science, we must be open to the possibility that our most cherished theories could be wrong.
取得成功的秘诀是开始。
从孩子出生的那一刻起，刺激就开始作用于他。
永远不要停止学习，因为世界永远不会停止变化。