Question

有以下几个用英文翻译为中文的句子题，请帮我看看我做得对不对，谢谢！

黑洞是什么，天文学家还没有完全解决这个问题。
what is a black hole ,astronomers haven't solved this problem completly.
据说黑洞可以将其周围的一切物体，如星星吞食掉。
it is said that black hole can swallowing up everything around it boundary area ,like stars.
科学家仍不能售出黑洞内发生了什么。
scientists can't imagine what happens in the black holes yet.
如果我们认识了黑洞，黑洞就不那么可怕了。
if we recognized black holes ,and then it will not such horrible.

Answer 1

what is a black hole？Astronomers haven't solved this problem completly.
it is said that a black hole can swallow up everything around it, such as stars.
scientists can't imagine what has happened in the black holes yet.
if we had known more about black holes ,and then they would not be so terrifying

对黑洞一无所知，究竟是单数还是复数，自己定夺吧，但要前后一致！.

Answer 2

it is said that black hole can swallow up everything like stars around it.

if we recognize black holes ,and then it will not be so horrible.修饰形容词一般用so。

Answer 3

Your answers are very good.but i want to ask you :in the third sentence,“售出”is
sold -offs but you write imagine,I don't know what is going on?