名词
中文翻译：Unknown
同义词：
['regular mailboat', 'regular ferry', 'regular steamship']
例句：
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1. The schedule for the regular mailboat service has been published.
定期邮船服务的时间表已经公布。
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2. The regular ferry service connects the two islands.
定期渡轮服务连接两个岛屿。
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3. The regular steamship service is a popular way to travel between cities.
定期蒸汽船服务是城市间旅行的流行方式。