Cardholders currently have 30 days to tell their card company that they want to reject an interest-rate increase, close the account and pay off the outstanding balance at the existing rate.

持卡人当前有30天通知其持卡公司，如他们想抵制利率的上升，可以在现有利率下，付清余额并关闭账户。

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For example, a high growth rate placed great strains on the existing structures of governance, of administration, and above all of socialization.

例如，高增长率给现有的治理结构、行政结构，尤其是社会化结构带来了巨大的压力。

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Amazon Elastic MapReduce pricing is on top of existing EC2 charges at the rate of 15%.

Amazon Elastic MapReduce的价格是在现有ec2的收费之上的15%比率。

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It would also bar insurance companies from denying coverage based on pre-existing medical conditions, and would limit their ability to impose large rate increases.

VOA: standard.2010.03.19

I'll tell you what could turn me bullish: home prices bottoming out and the turnover rate on existing homes picking up.

FORBES: Magazine Article

In the second quarter, the average interest rate on existing cards reached 14.7%, up from 13.1% a year earlier, according to research firm Synovate, a unit of Aegis Group PLC.

WSJ: Credit Cards Are Exception to Lower Consumer Rates

An existing 16.5% tax on wholesale transactions is to become a value-added tax at a slightly lower rate, though existing exemptions will survive (a mistake, say some economists).

ECONOMIST: Venezuela