knotty problem
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knotty problem
英
[knotty problem]
美
[knotty problem]
中文释义
难题
单词分析
单词结构:
knotty problem
字母数:14
记忆提示
🎯 重点记忆:
- 单词拼写:knotty problem
- 核心含义:难题
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更新时间:2026-08-27 15:52:00