第2个回答 2013-05-28
一般指的是名词。An abstract noun is a noun that refers to an idea, an action, a general quality or something that we cannot see or touch directly, e. g. excitement. Most abstract nouns are uncountable. Only a few of them are countable, e. g. a hope, an idea, and a situation. A concrete noun is a noun that refers to a physical object that woe can see or touch, e. g. man and water.