Switch on Lou Dobbs' news programme on CNN and you hear about the hollowing-out of the American middle class.

打开CNN的Lou Dobbs新闻节目，你会听到有关美国中产阶级正在被掏空的危言耸听。

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This paper expounds the methods for treating the ground dusting of cement mortar and the methods for treating the hollowing in pasting floor tile.

阐述了水泥砂浆地面起砂的处理方法及粘贴地面砖空鼓的处理方法。

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This is perhaps due less to the emotional restraint that is particular to the people of the northern countryside, and more to the hollowing out of their emotions.

这也许是由于他们感情的释放，而并非受到情感的压抑，尤其对于北部乡村的人们。

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The hollowing out of Zaire is nowhere more apparent than in the economy.

ECONOMIST: The last days of Mobutu

There have been two great articles written recently on the problem of the hollowing out of the middle class in America.

FORBES: How Do You Fix the Hollowing Out of America's Middle Class?

Now, all three problems tend to indicate that the hollowing-out of British manufacturing in the decades before the 2007-8 crash is perhaps more serious than the official statistics would tend to indicate.

BBC: It's trade or bust for Britain