主要调查方法包括面谈调查法和电话调查法。
Investigation method is as personal interview and telephone interview.
综合使用几种评估方法，如面谈，观察，讨论组，和调查法可以是很好的选择。
A combination of assessment methods, such as interviews, observation, focus groups, and surveys develops a very rich picture of one or a limited number of environments.
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