1. 结合，合并，联合
2. 工会
3. 联盟；联邦；同盟
4. 结婚，婚姻
5. 一致，和谐，团结，融洽
6. 协会，会社，联合会，社团
7. 学生自治会

1. [U] 联合,结合,合并 the act of joining or state of being joined into one
2. [C] 联盟,联邦; 工会; 俱乐部 a group of countries or state joined together; association or club formed by uniting parts, state, etc.
3. [U] 和睦,一致 a state of agreement and unity
4. [C] 结婚,婚姻 (unity in) marriage

1. an organization of employees formed to bargain with the employer;

   "you have to join the union in order to get a job"
   

2. the United States (especially the northern states during the American Civil War);

   "he has visited every state in the union"
   "Lee hoped to detach Maryland from the union"
   "the North's superior resources turned the scale"
   

3. the act of pairing a male and female for reproductive purposes;

   "the casual couplings of adolescents"
   "the mating of some species occurs only in the spring"
   

4. the state of being joined or united or linked;

   "there is strength in union"
   

5. the state of being a married couple voluntarily joined for life (or until divorce);

   "a long and happy marriage"
   "God bless this union"
   

6. healing process involving the growing together of the edges of a wound or the growing together of broken bones

7. a political unit formed from previously independent people or organizations;

   "the Soviet union"
   

8. a set containing all and only the members of two or more given sets;

   "let C be the union of the sets A and B"
   

9. the occurrence of a uniting of separate parts;

   "lightning produced an unusual union of the metals"
   

10. a device on a national flag emblematic of the union of two or more sovereignties (typically in the upper inner corner)

11. the act of making or becoming a single unit;

    "the union of opposing factions"
    "he looked forward to the unification of his family for the holidays"
    

1. being of or having to do with the northern United States and those loyal to the union during the American Civil War;

   "union soldiers"
   "Federal forces"
   "a Federal infantryman"
   

2. of trade unions;

   "the union movement"
   "union negotiations"
   "a union-shop clause in the contract"
   

1.工会
Aunion is a workers' organization which represents its members and which aims to improve things such as their working conditions and pay.

e.g. I feel that women in all types of employment can benefit from joining aunion.
我认为女性无论从事什么工作，加入工会都是有好处的。
e.g. ...union officials.
工会官员

2.联合；合并
When theunion of two or more things occurs, they are joined together and become one thing.

e.g. In 1918 the Romanian majority in this former tsarist province voted forunion with Romania.
1918年，这个前沙皇统治的省份中占了多数的罗马尼亚人投票赞成与罗马尼亚合并。

3.联盟；联合体
When two or more things, for example countries or organizations, have been joined together to form one thing, you can refer to them as aunion .

e.g. Tanzania is aunion of the states of Tanganyika and Zanzibar.
坦桑尼亚是坦噶尼喀和桑给巴尔两个政体组成的联合国家。
e.g. ...the question of which countries should join the currencyunion.
关于哪些国家应该加入货币联盟的问题

4.婚姻
The marriage of two people is sometimes referred to as aunion .

e.g. Even Louis began to think theirunion was not blessed in the eyes of God.
就连路易斯都开始认为他们的婚姻并没有受到上帝的祝福。

5.（用于名称中）俱乐部，协会，联合会
union is used in the name of some clubs, societies, and organizations.

e.g. The naming of stars is at the discretion of the International Astronomicalunion.
给星体命名是由国际天文学联合会决定的。
e.g. ...the Mothers'union.
母亲联合会

1. 工会：西方社会的工业革命与民主意识的抬头,工会(union)在劳资双方共同体中扮演举足轻重地位,从过去行政业务导向的人事部(Perso el Dept.)架构,演进到以策略伙伴自居的人力资源部门,人资专家与学术界一方面除了为过去努力享受甜美果实外,

2. 并：其它操作:插入(Insert)删除(Delete)更新(Update)域(domain) 给定一组域D1,D2,...,Dn,这些域中可以有相同的. 组(n-tuple)或简称元组. R:关系名 n:关系的目或度(Degree)并(union) 学号 姓名 性别连接(join) 连接与笛卡儿积的区别:结构化查询语言(SQL)基础