When gravity operates over microscopic distances—for instance, at the center of a black hole, where a huge mass is packed into a subatomic volume—the bizarre quantum properties of matter come into play, and string theory describes how the law of gravity c
When gravity operates over microscopic distances—for instance, at the center of a black hole, where a huge mass is packed into a subatomic volume—the bizarre quantum properties of matter come into play, and string theory describes how the law of gravity c
当重力在微观距离作用时，比如说，在黑洞的中心，极大量的质量被挤进一个次原子的体积中，物质那不寻常的量子性质就会显现出来，而弦论则描述了重力定律在此处如何改变。