粮食安全是国家安全的基石,我们必须牢牢把握在自己手中。
无政府状态是战争的允许性原因;它创造了一个国家必须依靠自助来确保生存的环境。
The most important thing is to keep your mind active.
The beauty of mathematics only shows itself to more patient followers.
Success comes from a combination of hard work, persistence, and a little bit of luck.