There's no simple solution to this problem.

　　這個問題沒有簡單的解決辦法。

　　It should have been a simple matter to check.

　　檢查核對本來應該是件簡單的事情。

　　I need a simple yes or no to my questions.

　　我的問題只需要簡單地回答是或不是。

　　It wasn't quite as simple as I thought it would be.

　　這事不完全像我想的那么簡單。

　　The principle behind it is very simple.

　　其中的原理十分簡單。