他们学会通过所完成的用户描述的数量来衡量他们的工作成果，并且根据这一数据来预知下一迭代开发阶段所能完成的工作。
They learn to measure the work they do by the number of user stories completed, and they use this number to predict their work for the next iteration.
这一数据根据的是发表在“生育与不孕”期刊的一项研究，虽然研究者不知道为什么。
This is according to a study published in the journal "Fertility and Sterility," although researchers have no idea why.
这一数据根据的是发表在“生育与不孕”期刊的一项研究，虽然研究者不知道为什么。
This is according to a study published in the journal “Fertility and Sterility, ” although researchers have no idea why.
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