People may die.Cities may vanish.Everything will disappear finally.
人可能会死去。城池可能会泯灭在历史的长河里，英雄会老去，美人会迟暮。一切都终将会消失，但总有一些故事会传承下来。
"The success of machine learning depends on the ability to balance the trade-off between bias and variance in the models we build."
办一件事都不能善始善终，就不要做很多事。