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difficult separation coal
difficult separation coal
英
[difficult separation coal]
美
[difficult separation coal]
中文释义
[矿业] 难选煤
单词分析
单词结构:
difficult separation coal
字母数:25
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单词拼写:difficult separation coal
核心含义:[矿业] 难选煤
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更新时间:2026-03-13 22:33:19