慢速英语:Bilingualism May Delay Different Kinds of Dementia

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短语讲解：

1. New research suggests that speaking more than one language may delay different kinds of dementia, that is the lost of mental ability

more than 不只是; 很
例句：More than 1000 turned up.
最后共有1000多人出席。

2. In fact, researchers say, speaking two languages appears to be more important than the level of education in defending against dementias.

in fact 实际上，其实
例句：In fact quite the opposite.
事实上，情况恰好相反。

3. 240 of those studied suffered from Alzheimer's, the most common form of mental decline.

suffer from 患（某种病），受（某种病痛）
例句：He is not the only one to suffer from this.
他不是唯一的一个身受其害的作家。

4. They can also cause sufferers to move back and forth between being wide awake and really sleeping.

back and forth 来回地; 一来一往
例句：The bird flew back and forth.
鸟前前后后地飞。