Further, its popularity is also attributed to the clean and comfortable environment of fast food restaurants, the excellent service, and the guaranteed quality of food.

快餐流行的一个更主要的原因归根于食品的干净和快餐店良好的环境，优秀的服务品质，以及可以信赖的食品质量。

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These SLAs will include quality of service (QoS) guarantees (setting guaranteed levels of response time, reliability, etc.), exception rules, and penalties for violation of guarantees.

这些SLA将包括服务质量(quality of service, QoS)保证(设置响应时间、可靠性等等的保证级别)、异常规则以及违反保证的惩罚。

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Secondly, its popularity is also attributed to the clean and comfortable environment of fast food restaurants, the excellent service, and the guaranteed quality of food.

其次，它的受欢迎程度也归因于快餐店的干净和舒适的环境，优质的服务，保证食品的质量。

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