if and only if

英 [if and only if]
美 [if and only if]

中文释义

当且仅当

单词分析

单词结构：

if and only if

字母数：14

记忆提示

🎯 重点记忆：

  • 单词拼写：if and only if
  • 核心含义：当且仅当

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更新时间：2026-02-01 22:06:41