Consider an example where a service aggregates information from multiple operational systems.
考虑一个例子：一个服务聚合来自多个系统的信息。
Emission control systems take longer to warm up and become fully operational in cold weather.
冷天时，排放控制系统需要花费较长时间预热，才能全效工作。
Emission control systems take longer to warm up and become fully operational in cold weather.
冷天时，排放控制系统需要花费较长时间预热，才能全效工作。
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