代词和限定词 - 断言不定代词和限定词

used to denote a certain, but unspecified, portion or selection of things or people

一些

a person who is not mentioned by name

某人

a person whose identity is not specified or known

有人

used to mention a thing that is not known or named

某物

used to express an unspecified amount or number of something

一些

used to refer to an unspecified selection within a group or category

某些