a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.怎么理解这句话?这句话应该没有缺成分

a black hole lies at the center of the Milky Way and of many of the 100 billion other galaxies estimated to exist in the universe.怎么理解这句话?这句话应该没有缺成分 black-hole black-hole Supermassive Black Hole 中文歌词 black hole的英文解释 Muse - Supermassive Black Hole 谢谢 黑洞 THE BLACK HOLE怎么样 Black Hole and out of A black hole weighing a billion tons ...这里用weighing 用weighs行不? 跪求高一必修三课文caught by a black hole全文翻译! 高中英语必修三（66页）caught by a black hole的翻译... A nearby object falling to into the black hole is never heard of again.寻求翻译 英语翻译Black Holes(黑洞) Black holes are some of the strangest things in space.A black hole sucks in anything that gets near it.Nothing can escape from a black hole—not even light.BLACK HOLES ARE STRONG Nothing escapes from a black hole beca muse - supermassive black hole的发行年代muse - supermassive black hole是什么时候发行的? 什么是Black Hole?Black Hole 是在宇宙里是一样东西解释一下下. 高中英语必修三（66页）caught by a black hole的全文翻译 速度!拜托了!人教版的 请高手翻译,Today,the term black hole is a part of the world's working vocabulary. A-HOLE什么意思?