Just to give you an example, when I went to Dikika, where Selam was found, in '99 -- and it's about 500 kilometers from Addis Ababa, the capital of Ethiopia.
比如，当我们去Dikika， 也就是塞勒姆99年被发现的地方，那里离Addis Ababa 埃塞俄比亚的首都约有500公里。