research and development efforts

英 [research and development efforts]
美 [research and development efforts]

中文释义

研究试制工作

单词分析

单词结构：

research and development efforts

字母数：32

记忆提示

🎯 重点记忆：

  • 单词拼写：research and development efforts
  • 核心含义：研究试制工作

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更新时间：2026-02-02 01:49:37