生产的最终条件是生产条件的再生产。
当九月结束时叫醒我
预测未来的最好方法就是去创造它。
"Effort makes you. You will regret someday if you don’t do your best now. Don’t think it’s too late but keep working on it."
没有阴影就没有阳光,了解夜晚是必要的。
The beauty of a mathematical idea is that it can be shared and understood across cultures and time.