a group of + 复数名词
后接复数可数名词；作主语时谓语动词可用单数（视为整体）或复数（强调个体）。
A group of tourists gathered at the gate.
一群游客聚集在门口。
乐队；乐团；组合；群体；社会群体；基；基团；官能团
A number of people or things that are together or considered together because they are related or share a feature.
相互关联的一些事物或人。
A number of things or persons being in some relation to one another.
视为一个整体的任意数量实体(成员)
any number of entities (members) considered as a unit
具有结合二元运算的集合,存在单位元,且每个元素都有逆元。
A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.
(化学) 两个或多个原子结合成一个单位并构成分子的一部分
(chemistry) two or more atoms bound together as a single unit and forming part of a molecule
共同演奏音乐的一群人(通常规模较小)。
A (usually small) group of people who perform music together.
一个封闭、结合、有单位元且每个元素有逆元的集合
a set that is closed, associative, has an identity element and every element has an inverse
相互邻近的一小群星系(最多约五十个)。
A small number (up to about fifty) of galaxies that are near each other.
化学元素周期表中的族。
A column in the periodic table of chemical elements.
官能团。
A functional group.
文化或社会中的子集。
A subset of a culture or of a society.
空军编队。
An air force formation.
岩石地层或岩层的集合。
A collection of formations or rock strata.
对文件、计算机及外设拥有相同访问、修改和执行权限的一组用户。
A number of users with the same rights with respect to accession, modification, and execution of files, computers and peripherals.
意式浓缩咖啡机中热水流入冲煮手柄的部件。
An element of an espresso machine from which hot water pours into the portafilter.
符干相连的一组八分音符、十六分音符等；有时泛指由几个短音符构成的装饰音。
A number of eighth, sixteenth, etc., notes joined at the stems; sometimes rather indefinitely applied to any ornament made up of a few short notes.
同一分区内相互比赛的一组队伍,同期不与分区内其他组队伍比赛。
A set of teams playing each other in the same division, while not during the same period playing any teams that belong to other sets in the division.
商业组织。
A commercial organization.
团体治疗。
Group therapy.
A group of students is waiting for the bus.
一群学生在等公交车。
用法提示：使用 "a group of" 表示一群人或物，强调作为整体。
The art club is a small group of dedicated painters.
美术俱乐部是一个由专注的画家组成的小团体。
用法提示："group" 作为名词，指有共同目标的集合体。
Please divide the class into groups of four.
请把全班分成四人一组。
用法提示："groups" 是复数形式，指多个小单位。
后接复数可数名词；作主语时谓语动词可用单数（视为整体）或复数（强调个体）。
A group of tourists gathered at the gate.
一群游客聚集在门口。
集体名词作主语时，英美英语都可用单数动词；若强调成员各自的行为，也可用复数，如 The group are divided on this issue.
The group meets every Thursday evening.
这个团体每周四晚上聚会。
表示“分组地”，常接 of 加数词说明每组的人数。
Please discuss the question in groups of three.
请以三人一组讨论这个问题。
grammar · medium
易错句子We worked in group.
正确表达We worked in a group.
英语可数名词单数前一般要有冠词或限定词；表示“以小组形式（在一个组里）”用 in a group，不能像汉语“分组”那样省略冠词。改为 in a group 后，group 前有不定冠词，句子才合语法。
grammar · medium
易错句子There are three group in our class.
正确表达There are three groups in our class.
group 是可数名词，前面有数词 three 时必须用复数 groups；汉语名词通常不靠词尾变化表示复数，所以容易漏掉 -s。
grammar · medium
易错句子She joined in the group last term.
正确表达She joined the group last term.
join 表示“加入（组织、团体）”时是及物动词，后面直接接宾语，不加 in；join in 通常表示“参加（活动）”。因此“加入这个小组”应为 join the group。
年龄组
The study surveyed three different age groups.
这项研究调查了三个不同的年龄组。
族群
The country is home to many different ethnic groups.
这个国家有许多不同的族群。
讨论小组
We formed a discussion group to talk about the book.
我们组成了一个讨论小组来谈论这本书。
工作组
A working group was established to address the issue.
成立了一个工作组来解决这个问题。
焦点小组
The company used a focus group to test the new product.
该公司使用焦点小组来测试新产品。
互助小组
She joined a support group for parents of children with autism.
她加入了一个自闭症儿童家长互助小组。
与group类似但更强调协作
group可以按类别划分
class是group的一种，通常指学生群体
紧密聚集的group，常用于数据或物体
有结构的group，如公司或社团
团体治疗
She found group therapy helpful for overcoming social anxiety.
她发现团体治疗对克服社交焦虑很有帮助。
群体思维
The committee's decision was a case of group think, lacking critical analysis.
委员会的决定是群体思维的案例，缺乏批判性分析。
同龄群体
Adolescents are heavily influenced by their peer group.
青少年深受同龄群体的影响。
集体拥抱！
After the team won, they all shouted 'Group hug!'
队伍获胜后，他们都大喊“集体拥抱！”
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Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.