- 1次群體、子群；小組（統計、研究報告裡常說「次族群」；數學上的「子群」）
A subgroup is a smaller group inside a bigger group. The people or things in it still belong to the big group, but they share something extra that makes them stand apart — an age, a language, a job, a way of doing things. If a study looks at 500 patients, the researchers might look separately at the subgroup of patients over sixty. If a company has a marketing team, there may be a subgroup that only handles social media. It is a slightly formal, organising word: you meet it in reports, research papers, school planning, and committee talk more than in the street. It is also a technical term in mathematics, where a subgroup is a group sitting inside another group under the same operation — but a will meet the everyday sense far more often. Notice a small thing about size and importance: 'sub-' says the group is a part of something larger, and often it is smaller and less important, but not always. A subgroup can be the biggest and busiest part of an organisation and still be called a subgroup, because the name is about where it sits, not how much it matters. It can also be a verb — to subgroup something is to divide it into subgroups — but that use is rare and technical, and most people would just say 'divide' or 'split into groups'.
組成sub- + group. 'Sub-' means 'under' or 'below'; here it means a part that sits inside something bigger. So: a group under a group.
同家族的字
- groupthe same 'group' — the base word
- subsectionsame 'sub-' — a section inside a section
- subheadingsame 'sub-' — a heading under a heading
- subtitlesame 'sub-' — a title under the main title
原始詞典資料3 筆記錄
以下是外部詞典記錄的用法，摘錄並精簡格式，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
subgroupnoun/ˈsʌbˌɡɹuːp/
- 1
A group within a larger group; a group whose members are some, but not all, of the members of a larger group.
- 1998, Robert A. Johnson, Prevalence of Substance Use Among Racial and Ethnic Subgroups in the United States, 1991-1993, Department of Health and Human Services, page B-11, Based on U.S. Bureau of the Census (1992c), other metropolitan areas that might be suitable for oversampling specific racial/ethnic subgroups include Miami (18% Cuban), New York City (7% Puerto Rican), Los Angeles (26% Mexican), and Honolulu (23% Japanese). Three techniques might be used to increase the yield of rare subgroup members within metropolitan areas where they are concentrated: 1) oversampling of areal segments containing high percentages of the subgroup, […] .
- The most important application of dysprosium and terbium, which belong to a subgroup known as the heavy rare earths, is in devices called neodymium boron magnets, or neo magnets for short.
- 2
group-theorymathematicssciencesA subset H of a group G that is itself a group and has the same binary operation as G.
- Much of the information about a group can be gleaned from a study of its subgroups. For these reasons it is important to study the subgroup structure of the almost simple groups, and in particular their maximal subgroups.
- A subgroup H of an algebraic group G is called algebraic if H is an algebraic subvariety of G. Algebraic subgroups defined over k (as algebraic subvarieties) are called k-subgroups. An algebraic subgroup of an algebraic group is called k-closed or closed over k (resp. k-defined or defined over k) if it is k-closed (resp. k-defined) as an algebraic subvariety.
subgroupverb/ˈsʌbˌɡɹuːp/
- 1
To divide or classify into subgroups
摘錄自 英文維基詞典 English Wiktionary，已精簡格式；依 CC BY-SA 4.0 授權使用，改動後的內容同樣以此授權提供。