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research and development efforts
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 09:37:11