personal observation是什么意思 personal observation怎么读
personal observation的英文翻译是什么意思，词典释义与在线翻译
personal observation的相关资料
personal observation的用法和样例
- Shelton based his theory upon what he called common sense and personal observation.
谢尔顿将他的理论以常识和个人观察作为基础。
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