The Echo Wall encloses the Imperial Vault.

回音壁是皇穹宇的围墙。

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And in the echo wall of history the sound of my laughter will echo on.

在历史的回音壁内，你定会听到我的笑声！

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This is the echo wall; standing on the top of a loud cry can feel a very strong echo.

这是回声壁，站在上面大声呼喊可以感受到很强烈的回声。

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But the case he makes seems to echo the analysis of some Wall Street economists, who view population growth as a critical advantage the United States will enjoy over China and the euro zone.

WSJ: The Weekend Interview with Rick Santorum: 'Supply-Sider' for the Working Man

Others maintain he is still running last year's presidential campaign, and that he needs to show himself as more presidential, by using his position to calm and explain, rather than merely echo the public's frustrations at Wall Street.

ECONOMIST: The row over bonuses: Rumbling on | The