...异 最大值：1.3 （即权重之和） 组内总人数的样本估计 组内实际总人数 FSF 比估计第二阶段因子（second-stage factor， SSF）。样本中的每个人按照其年龄、种族及 性别被分成72个组。
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The second factor is whether exports will stage a recovery.
第二个需要考虑的因素是出口是否呈现复苏。
The second stage is CFA (confirmatory factor analysis), which aims to test the proposed theoretical model and the hypotheses by means of SEM (structural equation model).
第二阶段是验证性分析，主要是利用结构方程建模技术对概念模型和相关假设进行分析验证。
Memory, as a important factor in foreign language learning, can be processed into three stages, that is, with sensory storage as the first stage, short term memory second and long term memory third.
记忆在外语学习过程中十分重要，由三个阶段构成。第一阶段为感觉储存阶段，第二阶段为短时记忆阶段，第三阶段为长时记忆阶段。
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