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BBC新闻:孕妇益多食鱼(2009-3-30)

发表时间:2009-04-02内容来源:VOA英语学习网
多年后科学家们已经从当年的孕妇和她们的孩子那搜集到了大量的数据。 Fish Eating Benefits Pregnant Women REPORTER: Sufficient levels of Omega-3 are required every stage of our lives says Joseph Heblin. This is especially true during fetal development. Doctor Heblin has come to this conclusion by drawing on the avian longitudinal study conducted in the UK at the University of Bristol. In 1991, more than 14 and a half thousand pregnant women were enrolled on the trial. Over the years, many scientists have collected large amounts of different data on the women and their children. JOSEPH HEBLIN: We published, in the last of last year, the study that indicates that when women are eating more fish their children have the best verbal IQ, when they are aged seven or eight. And when women are eating most fish, the children at seven or eight have the best behavioral profile. They interact with their peers better, they have better social behaviors and they have less problems with conduct disorders and violence. REPORTER: How much is the difference between the best as it were, the best behaved the best performing kids whose mothers' were eating lots of fish compared to the kids with most of the intellectual problems and the behavioral problems whose mothers' were eating the least amount of fish, how, how much of a gap is there between the two? JOSEPH HEBLIN: In an approximate way, when women were eating the most fish, about fourteen or fifteen percent of their kids had suboptimal IQ and suboptimal behavioral problems, about fourteen percent. And when women were eating no fish, then about thirty two percent of their kids were in the bottom quartile IQ or have suboptimal behavioral problems. So between, so it's a difference between fourteen percent and thirty two percent. And because the profiling of the children and the mothers' has been so careful we can tease out whether or not this effect of fish eating was really fish eating or whether it was something like how well the mothers' were educated or whether they were eating meat pies or vegetables or fruits or whether you know there was social conflict in the family when the kids were growing up or indeed a huge number of different factors which could have influenced this effect of fish eating. We are very confident that the suboptimal behavior and the suboptimal IQ was due to a relative deficiency of fish eating during the pregnancy. REPORTER: But you couldn't necessarily say that it's the Omega-3 fatty acid in take necessarily. JOSEPH HEBLIN: In this study, we don't purport. We think that it's likely that that's a huge contributor, um, but it's clear that there are other nutrients in fish which are contributory. REPORTER: Based on his studies, Joseph Heblin advocates that pregnant women eat plenty of fish, particularly oily varieties. But there is a conflict here with current dietary advice guidelines issued by United States government nutritionists four years ago. This advisory concern the potential risk to fetal brain development from the build up of the trace pollutant metal Mercury resulting from women eating too much fish. JOSEPH HEBLIN: When the advisory was created there was no consideration of the beneficial effects of fish. There was only calculation of huge important safety factors regarding avoiding trace amount of metal mercury. Now, we tested that balance in the Alice box study and used fish as the unit, not how much metal mercury, not how much, you know, Omega-3 but fish. And found that when you look overall at fish intake the beneficial effects of fish far out weight the detrimental effects of the metal mercury. Such that when women were following the US advisory of 2004 it actually was detrimental to their children and put their children at greater risk of low IQ and behavioral problems. REPORTER: Has that now been recognized by the powers that be? JOSEPH HEBLIN: Um, it is under intense study and review currently, by the Food and Drug Administration in the US. And there have been recommendations by international bodies of seafood inspectors and scientists, the international recommendations being reviewed. Our estimate is that, um, the level of the US advisory is to eat not more that 340 grams of seafood per week for pregnant women, that being the case, the estimate is that, this will, um, provide a mean benefit of avoiding metal mercury of about 0.009 IQ points. REPORTER: Pretty insignificant. JOSEPH HEBLIN: And the gain of IQ points in eating fish is about 2.1 IQ points. [注释]
1.fetal adj. 胎儿的,胎的 2.longitudinal study 纵向研究 3.enroll v. 参与,参加 4.peer n. 同龄人,同辈 5.intellectual adj. 智力的,理智的,善于思维的 6.approximate adj. 大致的,近似的 7.suboptimal adj. 不佳的,不最理想的,不最满意的 8.quartile n. 四分位数,四等位 9.deficiency n. 不足,缺乏,短缺 10.purport v. 意指, 声称 11.nutrient n. 营养,营养物 12.advocate v. 提倡,宣扬,主张 13.detrimental adj. 有害的,不利的 14.estimate n. 估计,估价,评估
[积少成多]
【due to 由于,应归于】
例句1:Due to circumstances beyond our control the lecture was cancelled.
由于无法控制的情况,讲座取消了。
例句2:The failure of the scheme was due to bad management.
计划的失败是由于管理不善。
来自:VOA英语网 文章地址: http://www.tingvoa.com/html/20090402/1214.html
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