subset

subset — noun

1. a group made up of members that are all contained within a bigger group of the s

1.名詞B2
釋義

a group made up of members that are all contained within a bigger group of the same kind

例句

Eleni's research team studied a subset of 200 patients from the larger hospital database.

collocation: subset of + number + noun

Only a small subset of the museum's collection was displayed during the renovation.

同義詞
  • part

    much more general; does not carry the idea that every member belongs to the larger set

  • portion

    focuses on a share or section of a whole rather than group membership

  • subgroup

    used especially for people or social groups rather than data or objects

反義詞
  • superset

    the larger set that fully contains the subset; used mainly in mathematics

文法句型

subset + of + noun phrase

用法筆記

Subset is used both in mathematics and in everyday language. In non-technical contexts it simply refers to a part of a larger group, but it always implies that every member of the smaller group is also a member of the larger group.

常見錯誤

❌Red apples are a subset of apples that are sweet.
✅Sweet red apples are a subset of apples.
💡A subset only describes membership in a larger group; it should not add conditions that not all members of the subset actually share.