nautical

Compared meaning: connected with the sea or ships (adjective).

比较义项：与海洋、船舶或航海相关的（形容词）。

• marine

  Used mainly in scientific or natural contexts to describe sea life, ecosystems, or environments, as in 'marine biology' or 'marine animals'.

  主要用于科学或自然语境，描述海洋生物、生态系统或环境，如“海洋生物学（marine biology）”或“海洋动物（marine animals）”。

  Marine animals like dolphins live in salty ocean water.

  海豚等海洋动物生活在咸咸的海水中。

• maritime

  Refers to human activity connected with the sea, such as trade, navigation, law, or history, as in 'maritime history' or 'maritime law'.

  指与海洋有关的人类活动，例如贸易、航海、法律或历史，如“航海历史（maritime history）”或“海事法（maritime law）”。

  The small town has a long maritime history of fishing and trade.

  这个小镇有着悠久的渔业和贸易航海历史。

• nautical 本词

  Describes things related to ships, sailors, or navigation, often used for themes, decorations, or technical terms, as in 'nautical stripes' or 'nautical charts'.

  描述与船只、水手或航海相关的事物，常用于主题装饰或专业术语，如“航海条纹（nautical stripes）”或“航海图（nautical charts）”。

  The restaurant was decorated with ropes and other nautical items.

  这家餐厅用绳索和其他航海饰品装饰。

Marine, maritime, and nautical all relate to the sea or ships. Marine is scientific, describing sea life, as in 'marine biology'. Maritime describes human sea activity, like trade or law. Nautical describes ships and sailing, as in 'nautical stripes'. Marine means 'a soldier', not compared.

这三个词都可表示与海洋或船舶有关，但侧重不同：marine 常用于科学、自然语境，描述海洋生物或环境；maritime 强调人类在海上的活动，如贸易、航海历史或法律；nautical 多指与航海、船只相关的事物，常用于主题装饰或专业术语。这里不比较 marine 作名词、大写时表示“海军陆战队员”的用法。