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发表时间：2017/2/20 15:44:10 来源：互联网点击关注微信：

The Bilingual Brain

When Karl Kim immigrated to the United States from Korea’s a teenager, he had a hard time learning English. Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language.1 As a graduate student, Kim worked in the lab of Joy Hirsch, a neuroscientist in New York. ____1____ They found evidence that children and adults don’t use the same parts of the brain when they learn a second language.

The researchers used an instrument called an MRI2 (magnetic resonance imaging) scanner to study the brains of two groups of bilingual people. ____2____. The other consisted of people who， like Kim，learned their second language later in life. People from both groups were placed inside the MRI scanner. This allowed Kim and Hirsch to see which parts of the brain were getting more blood and were more active. They asked people from both groups to think about what they had done the day before, first in one language and then the other. They couldn’t speak out loud because any movement would disrupt the scanning.

Kim and Hirsch looked specifically at two language centers in the brain - Broca's area3, which is believed to control speech production, and Wernicke’s area3, which is thought to process meaning. Kim and Hirsch found that both groups of people used the same part of Wernicke's area no matter what language they were speaking. ____3____

People who learned a second language as children used the same region in Broca’s area for both their first and second languages. People who learned a second language later in life used a different part of Broca’s area for their second language. ____4____ Hirsch believes that when language is first being programmed in young children, their brains may mix the sounds and structures of all languages in the same area. Once that programming is complete, the processing of a new language must be taken over by a different part of the brain.

A second possibility is simply that we may acquire languages differently as children than we do as adults. Hirsch thinks that mothers teach a baby to speak by using different methods involving touch, sound, and sight. ____5____

词汇：

immigrate / ??m??gre?t / vt.使移居入境

scanner / ?sk?n? / n.扫描仪

bilingual / ba??l??gw(?) l / adj.具备双语能力的

neuroscientist /'nj??r??'sa??nt?st / n.神经系统科学家

unique / ju:?ni:k / adj.独特的

disrupt / dis?r?pt /使中断

注释：

1.Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language.现在他说一口流利的英语，并且有一独特的机会来审视我们的大脑是如何适应第二语言的。adapt to：适应

2.MRI (magnetic resonance imaging)：磁共振成像

3.Bmca’s area：布洛卡区，也译为布罗卡区是大脑的一区，它主管语言讯息的处理、话语的产生。与Wernicke’s area共同形成语言系统。布若卡区与韦尼克区通常位于脑部的优势半脑(通常位于左侧)，这是由于大多数人(97%)是右利的缘故。1861年法国神经学家兼外科医生保罗。布罗卡(Paul Broca，1824—1880)对一些失语症患者进行研究及治疗时发现此一区域，位于大脑皮层额下回后部的44、45区，故以其发现者的名字命名为布罗卡区。

练习：

A　But their use of Broca’s area was different.

B　One group consisted of those who had learned a second language as children.

C　How does Hirsch explain this difference?

D　We use special parts of the brain for language learning.

E　And that is very different from learning a language in a high school or college class.

F　Their work led to an important discovery.

答案与题解：

1.F　根据本空的后一句：They found evidence that children and adults don’t use the same parts of the brain when they learn a second language.其中they found evidence与discovery相呼应。

2.B　依据本空的后一句The other consisted of people who, like Kim, learned their second language later in life. one. . . the other是一固定搭配，用来比较同类事物。

3.A　整段讲的是Kim他们对大脑的两个语言中心的分析，得出两组被试都用Wernicke’s area中同一地带，紧接着该谈被试们使用Broca’s area的情况。

4.C　本段的开头谈到孩子学习第一和第二语言都用Broca’s area相同的地带;而成人学习第二语言时使用Broca’s area不同的地带。后面都是Hirsch对这一现象的解释;He believes…根据上下文C是恰当的。

5.E　该句是全文的结束语。本段前两句都讲成年人与小孩习得语言的不同，Hirsch认为，母亲教小孩说话用不同于成人的方法，比如用触摸、声音和情景。Different是一关键词，所以，我们在中学和大学课堂学语言的方法和母亲教孩子的方法是不同的。

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