difficult separation coal

[difficult separation coal]
[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

记忆提示

🎯 重点记忆:

  • 单词拼写:difficult separation coal
  • 核心含义:[矿业] 难选煤