Methods The 15 soldiers selected through a hierarchical sampling method were treated by an un-structured interview.

方法采用分层随机取样法对抽取的15名陆军军人进行结构式访谈。

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Methods The 15 soldiers selected through a hierarchical sampling method were treated by an un-structured interview.

方法采用分层随机取样法对抽取的15名陆军军人进行结构式访谈。

youdao