不仅任何给定的约束机制存在局限性，而且一种约束技术不一定对所有信息格式都是最佳选择。
Not only will any given constraining mechanism typically include limitations, but a single constraint technology is not the best choice for all information formats.
电子邮件非常普遍，这让它成为了一种简单实用的反馈手段，我所熟悉的每种CI服务器都提供一定类型的电子邮件反馈机制。
The ubiquitous nature of E-mail makes it a simple and useful means of feedback — every CI server I'm familiar with provides some type of E-mail feedback mechanism.
这种机制必须是已得到的，并且必须以一定的方式高可用性地部署并管理。
This mechanism must be acquired, deployed in a manner that is itself highly available, and managed.
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