名词
中文翻译：不确定的航线同义词
同义词：
['uncertainty', 'indeterminate']
例句：
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1. The ship's position is uncertain due to the weather conditions.
由于天气条件，船只的位置不确定。
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2. The captain decided to take an uncharted route to reach their destination.
船长决定走一条未被标记的路线到达目的地。
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3. The pilot navigated through an unfamiliar area using a GPS system.
飞行员使用GPS系统导航通过一个不熟悉的区域。