And the huge amount of Japanese debt rolling over this year need not be a problem.

今年日本必须要重新发行的巨额公债不一定会是问题。

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While it can seem that the city is intent on stream rolling over its past, you can still see traces of old Edo.

即便这个城市热心踩着它的过去走向未来，你却依然能看到古江户的痕迹。

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Even if private bondholders can be made to share in some of the pain by rolling over their debts, this will still leave Greek public indebtedness unsustainably high.

即使成功地使私人债券持有者同意债券延期，承担危机的部分恶果，希腊的公共负债仍然高的难以为继。

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Google (Nasdaq: GOOG) mulled rolling out Voice-over-Internet Protocol, or VoIP, features to its new fiber network, which Google began lighting up last month, said Milo Medin, vice president of Google Access Services.

FORBES: Links 5 Dec: Google's Phone Over Fibre Explains Slow Economic Growth

Failure to reach agreement on the seven-year budget would mean the EU rolling over annual budgets - a method that would be more expensive and would complicate long-term projects.

BBC: EU budget: Leaders edge towards compromise deal

We recently analyzed the returns of a hypothetical global portfolio as well as a hypothetical US-only portfolio ( 1) over rolling 3-year periods between January 1, 1999 and December 31, 2011, with each rolling period resetting monthly (see graph below).

FORBES: Why Global Diversification Still Makes Sense