单词：observational method
observational method的用法和样例：
例句
- A pervasive problem is the vulnerability of observational data to distortions and biases.另外，观察法最常见的问题为资料容易被曲解及有偏差。
- The method of inspection is the educational psychology most basic research technique.观察法是教育心理学最基本的研究方法。
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