没有明确的概念定义快乐。

There is no way exact definition of the word happiness.

youdao

他们意识中并没有明确的概念，这里有很多观点。

They didn't have the concept firmly in mind. There are lots of aspects to it.

youdao

它有明确的概念。

It has a clear idea.

youdao

It is a transnational idea, in other words, which nevertheless has, obviously, certain specific applications depending on where it is.

这是一个跨国的概念，但是很明显，它也有其明确的地区性。

耶鲁公开课 - 文学理论导论课程节选

It's a little... I think that concept is a little bit easier to grasp. It's like a definite rule, and

不过这个有点……我认为这个概念掌握起来稍微容易点。因为有明确的规则，而且是

韩国人经常犯的失误 - SpeakingMax英语口语达人