久久国产欧美日韩精品,日韩国产精品久久久久久亚洲,99视频精品全部免费免费,91精品国产综合久久走光

May the sight of our human beings can only see apparent horizon forever.也許我們人類的目光永遠只能夠看到地平線.The time - like limIt'surface, the apparent horizon and the event horizon no longer coincide each other.這種黑洞的事件視界 、 表觀視界和類時...

apparent horizon的音標：...

地平線，視平線...