“visual flight rules”的概念、定义、翻译、参考文献-科学参考

单词	visual flight rules
释义	visual flight rules [`vizh·ǝ·wǝl `flīt ´rülz] ^{AEROSPACE ENGINEERING} A set of regulations set down by the U.S. Civil Aeronautics Board (in Civil Air Regulations) to govern the operational control of aircraft during visual flight. Abbreviated VFR.
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