mass-abstract noun抽象名词
mass noun hypothesis物质名词假设
mass noun N-MASS集合名词
N-COUNT(可数名词) A mass noun is a noun such as "wine" which is usually uncount but is used with "a" or "an" or used in the plural when it refers to types of that substance, as in "a range of Australian wines." 集合名词
N-COUNT(可数名词) In some descriptions of grammar, a mass noun is the same as an . 同uncount noun