In the Go-ForIt user stories, there's a requirement that every user can be a customer, who requests errand services, a Personal Assistant (PA), who performs errands on behalf of customers, or both.
在Go - ForIt用户情景中，有一个要求是每个用户可以是一个请求差事服务的“顾客”、一个为顾客执行差事的“私人助理”(Personal Assistant (PA))，或兼任两者。
To the Go-ForIt developers, this means that at any time a user will be acting in one of two roles, either a Customer or a PA.
对于Go - ForIt开发者，这意味着用户将随时扮演这两个角色的其中一个：“顾客”或PA。
You could either buy an MP3 or go to Yunnan for a visit if you pa the exam.
如果考试过关，你可以买一个MP 3或去云南玩一趟。
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