这个问题没有简单的解决方案。

There's no easy ___solution to this problem.

你会在背面找到这个谜题的答案。

You'll find the ___solution to the puzzle on the back page.

他们帮助你讨论问题，但不会给你任何解决方案。

They help you talk through your problems but they don't give you any ___solutions.