The Lowest Note in the Universe 宇宙中的最低音 It's coming from a black hole in the Perseus Cluster, about two hundred fifty million light years away. A black hole?And outer space?That makes sound? Whats happening out there is that interga

发表于:2019-02-16 / 阅读(46) / 评论(0) 分类 英语听力文摘 English Digest