R4

英 [R4]
美 [R4]

中文释义

[=very poor risk]重度危险

单词分析

单词结构：

R4

字母数：2

记忆提示

🎯 重点记忆：

  • 单词拼写：R4
  • 核心含义：[=very poor risk]重度危险

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更新时间：2025-12-10 09:30:17