我们能够探测到端粒长度的差异，这是一个很简单而且快速的技术：很多样本能够同时检验，更重要的是，我们能够判断出那些是危险的端粒？

We can detect very small differences in telomere length and it is a very simple and fast technique where many samples can be analysed at the same time.

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第三步，再经聚类分析将样本分群，并用方差分析检验群体之间有显著差异。

Thirdly, we grouped samples by cluster analysis, and test that there are significant differences among the groups.

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效果检验：编制调查问卷，利用配对样本t检验方法检验顶岗前后班级管理能力差异。

Result test: Prepare the questionnaire, and utilize the paired sample t to test the difference of class management ability before and after in-post practice.

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