To avoid outages, multiple key versions are simultaneously supported.

为了避免停机，将同时支持多个密钥版本。

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Used to choose the proper key if the selected column is a member of multiple key definitions.

如果选取的资料行为多重索引键定义的成员，则可用来选择适当的索引键。

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Multi DIMENSIONAL CLUSTERING (MDC) - organizing data in table (or range of a table) by multiple key values.

MULTI DIMENSIONAL CLUSTERING (MDC)——根据多个键值组织表(或一个表中的范围)中的数据。

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Still, demand for BlackBerry and its wildly popular BBM service is strong within multiple key markets worldwide, and the number of subscribers continues to increase.

ENGADGET: IDC: Android claims 75 percent of smartphone shipments in Q3, 136 million handsets sold

Mike Lanman, chief marketing officer of Verizon Wireless, said the company is addressing other user complaints in future releases, such as allowing users to type on a full keypad in portrait mode, rather than a keypad with multiple letters per key.

WSJ: BlackBerry Storm Is Off To Bit of a Bumpy Start

Shares in Biogen Idec dipped 2.7% not only because the Food and Drug Administration said it would take an extra three months to review its key multiple sclerosis drug, BG-12, but because an Abbott Laboratories kidney cancer medicine that in some ways works similarly to BG-12 failed.

FORBES: Biogen Says Its FDA Delay Unrelated To Abbott's Failed Medicine