最重要的胜利往往来自最艰难的失败之后。
The most important victories are the ones that come after the toughest defeats.
说出口的话无法收回，听到的话无法忘记。
"We are all our own graveyards I believe; we squat amongst the tombs of the people we were."
知识的每一次进步都会带来新的问题和新的困难。