down-and-up

英 [down-and-up]
美 [down-and-up]

中文释义

un. 上下来回的

单词分析

单词结构：

down-and-up

字母数：11

记忆提示

🎯 重点记忆：

  • 单词拼写：down-and-up
  • 核心含义：un. 上下来回的

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更新时间：2026-03-16 08:56:34