SSS 2009-10-19
时间：2019-01-08 作者：英语课 分类：Scientific American(十)月
In 1865, Pierre Paul Broca pinpointed 2 the part of the brain responsible for language by autopsying brains of the language-impaired—the region is now called Broca’s area. But more info has been hard to get. Because most brain research is done on animals—and they’re not talking.
The types of human research that we can do—such as brain scans—aren’t detailed 3 enough for identifying words, using grammar, and the act of speech. But in a study published October 16 in the journal Science, researchers found a way around this barrier.
Some epileptics who don’t respond to drugs undergo brain surgery. Before cutting, surgeons implant 4 electrodes to determine the exact site of the problem and to test healthy regions. So the researchers piggy-backed on the procedure by giving three patients language tests.
Patients thought of a word, changed its tense or number and silently articulated it. The scientists were able to pinpoint 1 these activities, all within Boca’s area. And the whole process took place within the 600 milliseconds that previous studies found was the time it takes for a person to go from zero to speaking. Researchers have thus now looked at the inner workings of Broca’s area—and communicated their findings.
- It is difficult to pinpoint when water problems of the modern age began.很难准确地指出，现代用水的问题是什么时候出现的。
- I could pinpoint his precise location on a map.我能在地图上指明他的准确位置。
- His refusal to help simply pinpointed his cowardice. 他拒绝帮助正显示他的胆小。
- Computers pinpointed where the shells were coming from. 计算机确定了炮弹发射的位置。
- He had made a detailed study of the terrain.他对地形作了缜密的研究。
- A detailed list of our publications is available on request.我们的出版物有一份详细的目录备索。