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時差N小時:近親生育的危害(上)

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Fans of classic movies will remember the famous dueling banjos scene in Deliverance, the story of four city friends who take an ill-fated boating trip down a backwoods Georgia river. As the friends set out, one of the friends challenges a local boy with a banjo to see who can play faster. At the end of the song, the camera zooms in to reveal the boy’s diseased, inbred features.

經典影片《激流四勇士》的粉絲一定還記得著名的五弦琴決斗場面吧!這部電影講述的是四個都市朋友乘著獨木舟沿著未開墾的喬治亞河冒險,一路上狀況不斷。剛出發的時候,其中一個朋友挑戰一個當地男孩,比賽誰彈五弦琴更快。曲終,鏡頭推向男孩,揭示了男孩因近親生育導致身體出現病態的事實。

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Such images have contributed to the taboo against marriage between first cousins. Geneticists explain that since closely related persons are more likely to harbor identical genetic mutations, their children have a greater chance of being born with defects.

這樣的一幕助長了禁止近親結婚的風氣。遺傳學者解釋稱,近親更有可能攜帶相同基因突變的信息,他們的孩子先天缺陷的風險更大。
But such risks might be overstated. According to one study, children from first cousin marriages are only 1.7 to 2.8 percent more likely to be born with serious birth defects than children of conventional marriages. Although the risk is still significant, it is lower than previously thought.
但是,這一風險似乎被夸大了。據一項研究顯示,表親婚后的孩子比非近親婚后的孩子出現先天嚴重缺陷的幾率僅高出1.7%至2.8%。盡管風險依然存在,但是沒之前預想的嚴重。

譯文來自可可英語

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previously ['pri:vju:sli]

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adv. 先前,在此之前

 
related [ri'leitid]

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adj. 相關的,有親屬關系的

 
scene [si:n]

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n. 場,景,情景

 
classic ['klæsik]

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n. 古典作品,杰作,第一流藝術家
adj.

 
harbor ['hɑ:bə]

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n. 海港,避難所
vt. 庇護,心懷,窩藏<

 
reveal [ri'vi:l]

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vt. 顯示,透露
n. (外墻與門或窗之間的

 
identical [ai'dentikəl]

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adj. 相同的,同一的

 
conventional [kən'venʃənl]

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adj. 傳統的,慣例的,常規的

 
genetic [dʒi'netik]

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adj. 基因的,遺傳的,起源的

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