慢速英语:Dementia Cases May Triple by 2050 as World Ages

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短语讲解：

1.  A new report predicts that number will increase to more than one hundred fifteen million by twenty-fifty.

more than 多于
例句：At some time more than five billion years ago the universe started. 
在50亿年前的某个时候，宇宙开始形成。 

2.  And if you look into the future projections, it may be close to one in every second by the year twenty-fifty.

look into　调查,观察
例句：The Government set up a working party to look into the problem. 
政府成立了工作组调查那个问题. 

3. The number of cases in the heavily populated developing world is expected to grow as more people live longer.

be expected to 预期，期望
例句：The commune is expected to bring in more rice this year. 
今年公社可望收获更多稻谷。

4. This number is likely to rise to more than seventy percent by twenty-fifty.

be likely to 可能
例句：The meal is likely to set us back 15 each. 
这顿饭我们可能每人要花15英镑. 

5. Yet the WHO says only eight countries currently have national programs in place to deal with dementia.

deal with　处理；打交道
例句：I refuse to deal with that firm any longer. 
我拒绝不再同那家公司交易。