名词
中文翻译：导航系统
同义词：
['navigation aids', 'navigating aids']
例句：
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1. The newnavigation aids have greatly improved the accuracy of our map reading.
新的导航辅助装置大大提高了我们地图阅读的准确性。
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2.The old navigation aids were not as effective as the new ones.
旧的导航辅助装置不如新的有效。
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3. The navigation aids are essential for pilots in long-distance flights.
对于长途飞行的飞行员来说，导航辅助装置是必需的。