“aid to navigation”的概念、定义、翻译、参考文献-科学参考

单词	aid to navigation
释义	aid to navigation [ād tǝ ´nav·ǝ`gā·shǝn] ^NAVIGATION A device external to a craft, designed to assist in determination of position of the craft, or of a safe course, or to warn of dangers or obstructions.
随便看	framing plan framing square framing table Francisella Francis formula Francis turbine francium Franck-Condon principle franckeite Franck-Hertz experiment Franck-Rabinowitch hypothesis francolite Franconian frangible frangible bullet frangible grenade frangula emodin frangulic acid Frankfurt horizontal Frankia Frankiaceae frankincense frankincense oil Frankland's method franklin

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