translation.en: In the 1970s, Stephen Hawking told us that a black hole, even though you think it's black, it actually emits radiation when you take into account quantum mechanics.
translation.zh: 在70年代 斯蒂芬·霍金告诉我们 虽然你认为黑洞是黑的 它其实会辐射 如果把量子力学考虑进去的话