There is only one answer to that.

那只有一个答案。

《新英汉大辞典》

There is only one answer, beer!

答案只有一个，那就是啤酒！

youdao

There is only one answer.

答案只有一个。

youdao

What is this orbital? Yup. And there's only 2pz one correct answer here, which is to 2 p z.

它的轨道是什么？，嗯，这里,只有一个答案，那就是。

麻省理工公开课 - 化学原理课程节选

If to bean or not to bean is the question, in Texas there is only one answer, typically delivered at length and in a tone of outraged disbelief.

BBC: The perfect chilli con carne in the heart of Texas

Like all such games, Resonance has the problem that there is generally only one right answer to a puzzle, and only one way to get to it.

FORBES: Review: Resonance - A Smart Techno-Thriller In A Classic Format

Why there are only two base pairs is an open question, and one which evolutionary biologists and geneticists want to answer.

ECONOMIST: A new kind of DNA