优化是在给定约束条件下做出最佳选择的艺术。
小说是一种思考世界的方式,一种理解世界的方式。
The truth is, we are all waiting for someone to come and save us.
The only secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards.
不偏不倚叫做中,不改变叫做庸。