secular fluctuation

英 [secular fluctuation]
美 [secular fluctuation]

中文释义

长期起伏

单词分析

单词结构：

secular fluctuation

字母数：19

记忆提示

🎯 重点记忆：

  • 单词拼写：secular fluctuation
  • 核心含义：长期起伏

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更新时间：2026-01-29 23:33:37