尽力而为者
Best doer
以上为机器翻译结果，长、整句建议使用 人工翻译 。
网络提供者们不担保某种程度的服务质量，仅承诺将尽力而为，这可能对个人电邮不算什么，但是对时间敏感的数据比如视频就很重要了。
Network providers do not guarantee a certain quality of service, but merely promise to do their best. That may not matter for personal e-mails, but it does for time-sensitive data such as video.
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