当在一个迭代发生时尝试EA时，常常会割裂时间盒——在这个周期结束时并没有得到可工作的软件。

When EA attempts at iterations occur, they are usually time-box decompositions - there is no working software at the end of the period.

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图2：在这种情况下，项目2的团队在执行编码时并没有花时间来开发测试，但是在迭代结束时花了时间来编写测试。

Figure 2: in this case, Project 2's team did not spend time developing tests as they implemented the code, but spent time at the end of the iteration writing tests.

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关于指甲艺术的聚会是不会在任何时间轻易结束的，那里有所有DIY的指甲艺术产品，在这里，复杂精细的美甲甚至比在家里修剪指甲还要简单。

The nail art party isn't ending any time soon and with all the DIY nail art products out there, it's even easier for at-home manicurists to replicate intricate designs.

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Now, towards the end of the class I want to devote a full week to discussing major disorders like depression and anxiety, because of their profound social importance.

在这门课结束前,我想花整整一周的时间,来讨论一些主要的心理障碍,比如抑郁和焦虑,因为它们有重大的社会意义

耶鲁公开课 - 心理学导论课程节选