systematic investigation and study

英 [systematic investigation and study]
美 [systematic investigation and study]

中文释义

系统调查研究

单词分析

单词结构：

systematic investigation and study

字母数：34

记忆提示

🎯 重点记忆：

  • 单词拼写：systematic investigation and study
  • 核心含义：系统调查研究

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更新时间：2026-02-01 03:22:44