naval hygienics

例句：

1. 1.The ship's crew is required to maintain a high level of naval hygiene to prevent the spread of diseases.
   船员必须保持高标准的海军卫生，以防止疾病的传播。
2. 2.The naval hygiene team has been working tirelessly to improve the cleanliness standards on board.
   海军卫生队一直在不懈努力，以提高船上的清洁标准。
3. 3. The new naval hygiene regulations have been implemented to ensure that all crew members are well-groomed and free from disease.
   新的海军卫生规定已经实施，以确保所有船员都整洁无病。