Non-identical twins are the result of two fertilized eggs implanting in the uterus at the same time.

非同卵双生胎是两个受精卵同时在子宫着床的结果。

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They study pairs of identical twins who grew up in different surroundings, like Jim Springer and Jim Louis.

他们研究了像吉姆·施普林格和吉姆·路易斯一样在不同环境中长大的同卵双胞胎。

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For example, Jim Springer and Jim Louis are identical twins.

例如，吉姆·施普林格和吉姆·路易斯是同卵双胞胎。

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One of her most famous photographs is called "Identical Twins."

VOA: special.2009.08.09

But what if you are able to find identical twins who were separated at birth, and reared in radically different environments.

如果你能找到，出生时就分开了的,同卵双胞胎，在完全不同的环境里长大。

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You look at identical twins, monozygotic twins who share the same genetic profile.

同卵双胞胎，他们拥有相同的基因谱。

哈佛公开课 - 幸福课课程节选

The twin rule of pathology states that any heritable disease will be more concordant (that is, more likely to be jointly present or absent) in identical twins than in non-identical twins and, in turn, will be more concordant in non-identical twins than in non-siblings.

ECONOMIST: Twin studies, genetics and the environment

However, the study, at the hospital's twin research unit, found that identical twins were more likely to have a similar number of moles than twins who are not identical.

BBC: Twins offer skin cancer clue

Maybe Galton's classic twins study was invalid: perhaps you cannot look at the similarities between identical twins, and those between non-identical ones, and conclude that the difference must necessarily be due to genes.

ECONOMIST: WHAT WE LEARN FROM TWINS: The mirror of your soul | The