In our design, we defined three personas: the typical customer, a group leader, and an administrator.
在我们的设计中，定义了三种角色：典型客户、组负责人和管理员。
Before the construction, we had made groups of experiments and selected the most typical group as the mix design for construction by the method of statistical analysis.
应用统计分析的方法，选出施工前做出的多组试验中最具有代表性的一组试验，作为施工的配合比设计。
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