预先使用容量规划来准备您的系统，以便在工作负载需求达到阈值水平时分配额外资源实例。

Use capacity planning ahead of time to prepare your system to allocate additional resource instances when workload demands reach the threshold level.

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今年，这个城市第一次对登记买车的数量进行配额限制，相比2010年的水平将新车拥有量下调了70%。

This year, for the first time, the city slapped a quota on the number of vehicles that can be registered, cutting the number of its newly added cars by nearly 70 percent compared with 2010 levels.

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