twin

n.

孪生儿之一，双胞胎之一；两个相像的人或物之一；孪晶；双人床

vt.

尤用于英国)使结成姊妹城市；使（两人或两事物）紧密结合；使偶合；使相连

adj.

成对的；成双的；双重的；双联的

复数：twins过去式：twinned现在分词：twinning第三人称单数：twins

twin screw双螺旋桨；双推进器；双驱动桥

twin sister双胞胎姐妹之一

twin brother n. 孪生兄弟

twin towers双塔式建筑

twin room两张单人床的双人房

twin cities双子城（位于美国西部）

identical twin n. 同卵双生，全等双生

deformation twin变形双晶；形变挛晶

twin bed（成对的）一张单人床；对床

1. I always confounded him with his twin brother.
   我总分不清他和他的孪生兄弟。
2. They are motivated by the twin goads of punishment and reward.
   他们受赏与罚的双重因素所激励。

1. I can't tell one twin from the other.
   我分不出双胞胎中谁是谁。

A twin study of recent life events and difficulties.
The twin crises: The cause of banking and balance of payment problems
Twin studies of psychiatric illness. Current status and future directions.
A longitudinal twin study of personality and major depression in women.
A longitudinal twin study of 1-year prevalence of major depression in women.
A population-based twin study of major depression in women. The impact of varying definitions of illness.
Alcoholism and major depression in women. A twin study of the causes of comorbidity.
Genetic heritability and shared environmental factors among twin pairs with autism
Schizophrenia as a Complex Trait: Evidence From a Meta-analysis of Twin Studies
A pilot Swedish twin study of affective illness including hospital- and population-ascertained subsamples: Results of model fitting