名词
中文翻译：Unknown
同义词：
['Loran-C warning', 'Loran-C alert']
例句：
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1.The Loran-C system was used to detect the location of ships at sea.
罗兰-C系统被用来在海上探测船只的位置。
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2. The Loran-C system is a vital part of our navigational aids.
罗兰-C系统是我们导航工具中至关重要的一部分。
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3. The Loran-C system has been improved significantly since its introduction.
自从引入罗兰-C系统以来，它已经得到了显著的改进。