secondary seal

英 [secondary seal]
美 [secondary seal]

中文释义

二级封闭

单词分析

单词结构：

secondary seal

字母数：14

记忆提示

🎯 重点记忆：

  • 单词拼写：secondary seal
  • 核心含义：二级封闭

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更新时间：2026-02-02 20:50:02