The biggest risk is not taking any risk. In a world that's changing quickly, the only strategy that is guaranteed to fail is not taking risks.
语言是存在的家。人在其中栖居。
The study of mathematics is a journey into the unknown, where each discovery opens the door to new mysteries.
广义相对论已经通过了我们所有的测试,甚至在超大质量黑洞附近也是如此。