three unders in coal
查询英语单词中文释义、音标、发音和例句。
three unders in coal mining
英
[three unders in coal mining]
美
[three unders in coal mining]
中文释义
三下采煤
单词分析
单词结构：
three unders in coal mining
字母数：27
记忆提示
🎯 重点记忆：
- 单词拼写：three unders in coal mining
- 核心含义：三下采煤
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更新时间：2026-08-31 02:57:26