如今，多伦多约克大学的艾伦·比亚里斯托克等学者认为这项研究有“严重的缺陷”。
Today's scholars, like Ellen Bialystok at York University in Toronto, say that research was "deeply flawed."
最新的研究成果由来自丹麦哥本哈根大学和雷基亚比克的冰岛大学的研究者发现。
The latest research was carried out by researchers at the University of Copenhagen in Denmark and the University of Iceland in Reykjavik.
即使中年后才学习第二种语言，它仍然可以帮助延缓老年痴呆症，纽约的比亚韦斯托克说。
Even if you don't learn a second language until after middle age, it can still help stave off dementia, York's Bialystok said.
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