Word · Frequency #578
joins
连接处;接合点;接缝
joins is the plural of join.
a place where two things are joined, or the act of joining; a junction
- 1.
An act of joining or the state of being joined; a junction or joining.
连接或结合的行为或状态;接合点或连接。
- 2.
the shape or manner in which things come together and a connection is made
连接处;接合方式
- 3.
An intersection of piping or wiring; an interconnect.
管道或线路的交叉点;互连。
- 4.
a set containing all and only the members of two or more given sets
并集;包含两个或更多集合所有成员的集合
- 5.
An intersection of data in two or more database tables.
两个或多个数据库表中数据的交集。
- 6.
The act of joining something, such as a network.
加入某事物(如网络)的行为。
- 7.
The lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol ∨.
最小上界,格中一对元素间的一种运算,用符号∨表示。
- 8.
The smallest linear space containing both of two given linear spaces.
同时包含两个给定线性空间的最小线性空间。
接头;接口;加入;参加;并集;连接(数据库操作);并(格论中的最小上界)
In use
The carpenter carefully sanded the join to make it smooth.
In set theory, the join of two sets is the set of all elements that belong to either set.
The plumber applied sealant to the join between the two pipes.
Connections
Collocations
- inner join
- 内连接(只返回两表中匹配行的连接)
- An inner join returns only the rows that exist in both tables.内连接只返回同时存在于两个表中的行。
- left join
- 左连接(返回左表全部行及右表匹配行的连接)
- A left join gives you every row from the left table and only matching rows from the right table.左连接返回左表的每一行以及右表中匹配的行。
- right join
- 右连接(返回右表全部行及左表匹配行的连接)
- A right join is like a left join but keeps all rows from the right table.右连接与左连接类似,但保留右表中的所有行。
- full join
- 全连接(返回两表中所有行的连接)
- A full join returns all rows from both tables, filling in missing matches with nulls.全连接返回两个表中的所有行,缺失的匹配项用空值填充。
- cross join
- 交叉连接(两表所有行的笛卡尔积)
- A cross join pairs each row in one table with every row in the other table.
Learner notes
Memory Tip
join 开头的 j 像一个钩子,把两边钩在一起,就是“连接处”。
Context & Register
语域:neutral 常见场景:woodworking/construction、plumbing/electrical wiring、mathematics/computer science 作名词的 join 多用于描述两个事物相接的位置或方式,常见于木工、建筑、管道、电路等技术语境;在数学/计算机领域中还可指“并集”或“连接”。日常口语中较少单独使用,通常可根据上下文理解为“接缝/接头”。
Grammar Note
作为名词时,通常与介词 between 或 of 连用。
Pronunciation & Spelling
这些词都以 /ɔɪn/ 结尾,与 join /dʒɔɪn/ 押韵。注意拼写相近的 joint /dʒɔɪnt/、joist /dʒɔɪst/ 等发音不同,不要误认为押韵。
High-value vocabulary
该词属于 Oxford 核心词汇,值得优先掌握常见搭配和句型。
Usage priority
Collins 词频等级为 5,建议结合例句记忆,而不是只背中文释义。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.