In Type 3 situations, there are few alternatives, but the ability to switch without difficulty creates a threat that companies can use to negotiate concessions from existing suppliers.

在第三种情况下，几乎没有其他选择，但毫无困难地转换的能力造成了一种威胁，企业可以利用这种威胁与现有供应商谈判让步。

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If transaction logging is used for backups, use this switch only before the full backup schedule (once a week).

如果事务日志用于备份，只在完全备份计划(每周一次)之前使用此开关。

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Use the scenario to switch the database for SQL validation.

使用 切换 SQL 检验所用的数据库 场景。

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Switch fees are the charges for the use of the MasterCard Debit Switch.

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It's a bit speculative, but once scientists understand how receptors work, they can in theory use chemical agents to switch them on or off.

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Data centres forced to switch to the use of back-up generators warned that they might run out power.

BBC: Websites knocked offline by super-storm Sandy