名词短语
中文翻译：仪器飞行规则
同义词：
['Instrument Flight Regulations (IFR)']
例句：
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1.The pilot must follow the instrument flight rule when flying over mountainous terrain.
飞行员在飞行山区时必须遵守仪器飞行规则。
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2.The airline has strict regulations for the instrument flight rule to ensure safety.
航空公司对仪器飞行规则有严格的规定，以确保安全。
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3.The pilot was required to adhere to the instrument flight rule during the emergency landing.
在紧急降落过程中，飞行员必须遵守仪器飞行规则。