音标：[twin]
n. 双胞胎中一人, 一对非常相像的人(或物)中的一个
a. 双胞胎的, 成对的, 孪生的
vi. 生双胞胎, 成对
vt. 怀(双胞胎), 使成对
【化】 孪晶
【医】 双胎, 双生儿
在线英汉词典
twin的短语、例句：
twin
n
1 [C] either of a pair of children or young animals born of the same mother at the same time 双胞胎之一; 孪生儿之一
She is expecting twins. 她怀著双胞胎.
One ewe has produced twins. 一只母羊一胎生了两只小羊.
[attrib 作定语]
my twin brother/sister 我的孪生兄弟[姐妹]
twin lambs 一胎生的两只小羊羔.
2 [C] either of a pair of similar, usu matching, things 一对相似的（通常相匹配的）事物之一
The plate was one of a pair, but I broke its twin. 这盘子原来有一对, 我打坏了一个.
[attrib 作定语]
There are twin holes on each side of the instrument. 这器械的两边有一对眼 孔.
a ship with twin (ie two identical) propellers 双推进器的船.
3 the Twins [pl]
= Gemini. twin, v (-nn-) [esp passive 尤用於被动语态
Tn, Tn.pr]
~ sth (with sth)
(a) join (two people or things) closely together; pair 将（两人或两事物）结合在一起; 匹配.
(b) set up a special relationship between (two towns in different countries), eg by organizing social or sporting visits 在（两国各一城市）之间建立关系（如开展社交或体育互访活动）
Oxford is twinned with Bonn. 牛津与波恩结成了友好城市.
twin