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research and development efforts

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

中文释义

研究试制工作

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单词结构:

research and development efforts

字母数:32

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🎯 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:2025-12-08 06:38:41

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