每个角色都有一个故事，每个故事都有一个角色。
"Every character has a story, and every story has a character."
Every life is unique and deserves to be remembered.
The world is full of obvious things which nobody by any chance ever observes.
我不后悔做过的事，只后悔有机会时没做的事。
系统的稳定性取决于开环传递函数在复平面上的行为。