It's a concept that is difficult to render into English.

这个概念难以用英语来表达。

《牛津词典》

An idea or definition is a concept, not a percept.

一个理念或者定义是一种概念，而不是一种感知。

youdao

Second, consumers in the 21st century are drawn to "global" as a concept.

其次，21世纪的消费者被“全球化”这个概念所吸引。

youdao

Consideration of a minority patient's language, customs and beliefs by virtue of their heritage is a concept known as cultural competency.

VOA: standard.2010.03.05

That is to say, it is not a system of signs understood as stable relationships between a concept world and a world of signifying.

也就是说，它不是一个符号系统，这个符号系统被理解为,概念世界和指示世界间的稳定的关系。

耶鲁公开课 - 文学理论导论课程节选

So if I take away the quotation marks, all I have is the word with no indication that it's a concept.

所以如果我拿掉引号，剩下的就只是这个词而不指示一个概念了。

耶鲁公开课 - 文学理论导论课程节选

Then again, getting something for nothing is a concept that MTV should be familiar with.

FORBES: Is MTV Aging Well?

They may not even have a concept of a simple computer, let alone Google Glasses.

FORBES: Global Poverty: The Real Reason Most People Won't Wear Google Glasses

Immersive video is a concept that technology companies have experimented with, finding varying levels of success.

BBC: 180 degree television for the home?