TVMDC

Acronym	Definition
TVMDC➣True + Variation = Magnetic & Magnetic + Deviation = Compass (navigation formula)
TVMDC➣True Virgins Make Dull Companions (mnemonic for navigation formula)
TVMDC➣TV Makes Dull Children (mnemonic for navigation formula)

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英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。