translation.en: So, if I were to compress the Earth down to the size of a sugar cube, it would become a black hole, because the size of a sugar cube is its Schwarzschild radius.
translation.zh: 如果把地球压缩至一块方糖大小， 地球就会成为一个黑洞 因为方糖的大小是它的史瓦西半径。