Plenty of research has shown that learning a second language can boost brainpower, but a new study out Monday suggests that the effects extend to those who begin in middle childhood.
The study in the Proceedings of the National Academy of Sciences showed that people who began learning English around age 10 and were immersed in the language, meaning they heard and used it in daily life, showed improvements in the structure of the brain’s white matter compared to people who grew up speaking only English and did not learn a second language.
Researchers studied brain scans from 20 people, all around the age of 30, who had lived in Britain for at least 13 months. They had all started learning English as a second language around age 10. Their imaging analyses were compared to 25 people of similar age who spoke only English.
"Everyday handling of more than one language functions as an intensive cognitive stimulation that benefits specific language-related brain structures by preserving their integrity, and therefore it protects them against deterioration in older age," said the study led by Christos Pliatsikas of the University of Kent School of Psychology.
extend：動詞，延伸，擴大。例句：Rain is expected to extend to all parts of the country by this evening.（今天傍晚之前，預計降雨範圍會擴大到全國各個地區。）
immerse：動詞，沉浸。例句：She got some books out of the library and immersed herself in Jewish history and culture.（她從圖書館借了一些書，然後沉浸在猶太歷史和文化之中。）
deterioration：名詞，惡化。例句：We’ve seen a deterioration in relations between the countries.（我們發現兩國關係趨於惡化。）
宏浩翻譯 引用自 http://iservice.ltn.com.tw/Service/english/english.php?engno=857025&day=2015-02-19