—— 请按键盘 空白键 开始游戏 ——

每一个失败的实验都是迈向成功的一步,只要你从中学习。
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.
The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."