external sources of impurities

[external sources of impurities]
[external sources of impurities]

中文释义

质的外部来源

单词分析

单词结构:

external sources of impurities

字母数:30

记忆提示

🎯 重点记忆:

  • 单词拼写:external sources of impurities
  • 核心含义:质的外部来源