天文学家还没有完全解决这个问题的英文

astronomers have not yet fully answered the question of what a black hole is

• 天文学家:    astronomer; astrol ...
• 还:    still; yet
• 没有:    not have; there is ...
• 完全:    complete; whole; p ...
• 解决:    solve; resolve; se ...
• 这个:    this one; this
• 问题:    question; problem