Word · Frequency #578
joins
连接处;接合点;接缝
joins is the plural of join.
核心释义
a place where two things are joined, or the act of joining; a junction
- 1.
连接或结合的行为或状态;接合点或连接。
An act of joining or the state of being joined; a junction or joining.
- 2.
连接处;接合方式
the shape or manner in which things come together and a connection is made
- 3.
管道或线路的交叉点;互连。
An intersection of piping or wiring; an interconnect.
- 4.
并集;包含两个或更多集合所有成员的集合
a set containing all and only the members of two or more given sets
- 5.
两个或多个数据库表中数据的交集。
An intersection of data in two or more database tables.
- 6.
加入某事物(如网络)的行为。
The act of joining something, such as a network.
- 7.
最小上界,格中一对元素间的一种运算,用符号∨表示。
The lowest upper bound, an operation between pairs of elements in a lattice, denoted by the symbol ∨.
- 8.
同时包含两个给定线性空间的最小线性空间。
The smallest linear space containing both of two given linear spaces.
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)
用法In use
The carpenter carefully sanded the join to make it smooth.
用法提示:这里的“join”是名词,表示两个部件连接的地方。
In set theory, the join of two sets is the set of all elements that belong to either set.
用法提示:这里的“join”是名词,表示数学中的并集。
The plumber applied sealant to the join between the two pipes.
用法提示:这里的“join”是名词,指管道连接处。
the join between A and B
join 作名词时指两物相接之处,between 后面接相接的两方。
You can hardly see the join between the two pieces of wood.
几乎看不出两块木头之间的接缝。
a join in sth
指管道、线路等的接口时,可用 a join in + 物体。
相关词与表达Connections
搭配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。
学习提示Learner notes
记忆技巧Memory Tip
join 开头的 j 像一个钩子,把两边钩在一起,就是“连接处”。
语境与语域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”。
语法说明Grammar Note
作为名词时,通常与介词 between 或 of 连用。
发音与拼写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。
高价值词汇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。
用法优先级
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.