primary time and frequency standard

[primary time and frequency standard]
[primary time and frequency standard]

中文释义

原级时[间]频[率]标准

单词分析

单词结构:

primary time and frequency standard

字母数:35

记忆提示

🎯 重点记忆:

  • 单词拼写:primary time and frequency standard
  • 核心含义:原级时[间]频[率]标准