Unit27：Sentence 27

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If

如果

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identical twins

同卵双胞胎

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are

是

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more similar

更相似

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to each other

彼此之间

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If identical twins are more similar to each other

如果同卵双胞胎彼此之间更相似

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with respect to

关于

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an ailment

一种疾病

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with respect to an ailment

在某种疾病方面

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If identical twins are more similar to each other with respect to an ailment

如果同卵双胞胎在某种疾病方面比异卵双胞胎更为相似

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than

比

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fraternal twins

异卵双胞胎

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than fraternal twins are

比异卵双胞胎更相似

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If identical twins are more similar to each other with respect to an ailment than fraternal twins are

如果同卵双胞胎在某种疾病上的相似度高于异卵双胞胎

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then

那么

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vulnerability to the disease

对这种疾病的脆弱性

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then vulnerability to the disease

那么对这种疾病的易感性

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If identical twins are more similar to each other with respect to an ailment than fraternal twins are , then vulnerability to the disease

如果同卵双胞胎在某种疾病上的相似度高于异卵双胞胎，那么对该疾病的易感性

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must be rooted

必须植根于

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at least

至少

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in part

部分地

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in heredity

遗传因素

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must be rooted at least in part in heredity

至少部分必须根源于遗传

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If identical twins are more similar to each other with respect to an ailment than fraternal twins are , then vulnerability to the disease must be rooted at least in part in heredity

如果同卵双胞胎在某种疾病上的相似度高于异卵双胞胎，那么这种疾病的易感性至少部分源于遗传