用户可以在注册阶段或被系统引用的时候选择自己的角色。

Users have the opportunity to choose their roles during the registration phase, or at the time they are referenced by the system.

youdao

根据不同的缓存策略，它可能还需要注册阶段0协议来将日志消息存储到数据库中在事务完成之前。

Depending on caching strategy, it might also register for the phase zero protocol to flush log messages upon transaction completion.

youdao

每个阶段中，路径中的任何元素都可以注册为事件观测者，从而能够触发事件处理程序。

During each phase, any element along the path can be registered as an observer of the event, and can thus trigger an event handler.

youdao

You can go online and sign up there but you're still shopping so we're not starting sections tonight.

你可以上网去注册一下,不过既然目前还在选课阶段,所以今天晚上我们不开始章节的讨论

耶鲁公开课 - 聆听音乐课程节选