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research and development
research and development
英
[research and development]
美
[research and development]
中文释义
[计] 研究与开发, 研究与发展 [化] 究研与开发
单词分析
单词结构:
research and development
字母数:24
记忆提示
🎯 重点记忆:
单词拼写:research and development
核心含义:[计] 研究与开发, 研究与发展 [化] 究研与开发
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更新时间:2026-03-16 22:36:32