graded region

英 [graded region]
美 [graded region]

中文释义

内河分级航区

单词分析

单词结构：

graded region

字母数：13

记忆提示

🎯 重点记忆：

  • 单词拼写：graded region
  • 核心含义：内河分级航区

最近查询：

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更新时间：2026-03-27 04:41:33