Happiness is an abstract noun.

“快乐”是一个抽象名词。

It is an abstract noun.

它是抽象名词。

This is an abstract noun, not a material noun.

这是抽象名词, 不是物质名词.

Teacher: What’s an abstract noun, Jane?

老师:珍妮，什么叫抽象名词？

I can not understand so abstract noun conception.

我无法理解如此抽象的观念。

This is an abstract noun, but it is used as a common noun here.

这是一个抽象名词，在这里用做普通名 词。

Notice this is an abstract noun, but it is used as a common noun here.

注意,这是一个抽象名词, 但在这里当普通名词用.