Translation of "Concept" in Chinese

I understand the concept.

我明白这概念。

The concept doesn’t make sense.

理念没有道理。

I really like the concept of this website.

我觉得这个网站的概念非常好。

They implemented a communication policy so as to promote their new concept.

他们到位了实行新概念的广告策略。

To him, hunger was an abstract concept; he always had enough to eat.

對他來說，「肚子餓」是個抽象的概念，因為他從來就沒有餓過。

This is an East Asian concept -- it's a little tricky to explain in Spanish.

這是一個東方的概念，用西班牙語不太好解釋。

The concept of “Internet addiction” implies that “the Internet” is some sort of definable activity.

“网络成瘾症”这个理念将意味着“网络”是一种可以下定义的活动。