Recent findings lend strong support to the theory that there is a black hole lying at the milky Way's center and many of the 100 billion other galaxies estimated to exist in the universe.
不平行
not parallel
a black hole at the center of a and of b 为什么不可以是there is a black hole and many of the galaxies? there is说得不清楚是哪里 后面是galaxies estimated 所以不可以与 hole lies平行
and前后不平行;there be句型累赘
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