- 1.它针对服务的执行方式定义了服务水平协议(SLA)，令使用者和提供者都能明白他们所受的限制和抱有的预期。
It defines the service-level agreements (SLAs) for how services should perform, so that both the consumers and the provider know their limitations and expectations.
dict.yoduao.com - 2.操作无方向限制，令使用者方便，灵活，感觉更体贴。
There is no directional limit on the operation, so that the use can be more convenient, flexible and comfortable.
dict.yoduao.com
有道词典