名词短语
中文翻译：船的类别
同义词：
['ship class', 'ship category例句：1. The captain was discussing the class of ships that would be joining him in his new command.（船长正在讨论即将加入他新指挥的船只类别。）']
例句：
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1. The captain was discussing the class of ships that would be joining him in his new command.
船长正在讨论即将加入他新指挥的船只类别。
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2.The classification of ships is based on their size and purpose.
船只的分类是根据大小和用途进行的。
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3. The classification of ships has changed significantly over the years.
多年来，船只的分类发生了显著变化。