会说外语好处多：双语者大脑反应速度更快
<p><span word="Speaking">Speaking</span> <span word="two">two</span> <span word="languages">languages</span> <span word="can">can</span> <span word="actually">actually</span> <span word="help">help</span> <span word="offset">offset</span> <span word="some">some</span> <span word="effects">effects</span> <span word="of">of</span> <span word="aging">aging</span> <span word="on">on</span> <span word="the">the</span> <span word="brain">brain</span>, <span word="a">a</span> <span word="new">new</span> <span word="study">study</span> <span word="has">has</span> <span word="found">found</span>.</p><p>一项新研究发现，说两种语言实际上能够帮助消除衰老对大脑的影响。</p><p><span word="Researchers">Researchers</span> <span word="tested">tested</span> <span word="how">how</span> <span word="long">long</span> <span word="it">it</span> <span word="took">took</span> <span word="participants">participants</span> <span word="to">to</span> <span word="switch">switch</span> <span word="from">from</span> <span word="one">one</span> <span word="cognitive">cognitive</span> <span word="task">task</span> <span word="to">to</span> <span word="another">another</span>, <span word="something">something</span> <span word="that">that</span>’<span word="s">s</span> <span word="known">known</span> <span word="to">to</span> <span word="take">take</span> <span word="longer">longer</span> <span word="for">for</span> <span word="older">older</span> <span word="adults">adults</span>, <span word="said">said</span> <span word="lead">lead</span> <span word="researcher">researcher</span>, <span word="Brian">Brian</span> <span word="Gold">Gold</span>, <span word="a">a</span> <span word="neuroscientist">neuroscientist</span> <span word="at">at</span> <span word="the">the</span> <span word="University">University</span> <span word="of">of</span> <span word="Kentucky">Kentucky</span>. <span word="As">As</span> <span word="he">he</span> <span word="spoke">spoke</span> <span word="to">to</span> <span word="ABCNews">ABCNews</span>.<span word="com">com</span> <span word="from">from</span> <span word="his">his</span> <span word="cell">cell</span> <span word="phone">phone</span>, <span word="he">he</span> <span word="said">said</span> <span word="he">he</span> <span word="was">was</span> <span word="also">also</span> <span word="in">in</span> <span word="a">a</span> <span word="grocery">grocery</span> <span word="store">store</span> <span word="choosing">choosing</span> <span word="between">between</span> <span word="gala">gala</span> <span word="and">and</span> <span word="granny">granny</span> <span word="smith">smith</span> <span word="apples">apples</span> — <span word="a">a</span> <span word="perfect">perfect</span> <span word="example">example</span> <span word="of">of</span> <span word="switching">switching</span> <span word="between">between</span> <span word="cognitive">cognitive</span> <span word="tasks">tasks</span> <span word="in">in</span> <span word="everyday">everyday</span> <span word="life">life</span>.</p><p>研究者测试了参与者们从一个认知活动转换到另一个需要的时间。主管研究员布莱恩·古尔德是肯塔基大学的神经学家，他表示老年人转换任务需要的时间更长。当他和<span word="ABCNews">ABCNews</span>的记者在手机上说话时，他说自己正在一家蔬果店考虑到底是要买小富士苹果还是美国青苹果，这就日常生活中认知活动最典型的例子。</p>
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