This is the 3688th most frequent Chinese word.
航海
"航海" means "navigation" or "voyage by sea."
Here, '航海' refers to the topic or knowledge field of navigation and maritime exploration.
我喜欢阅读关于航海的书籍。
I enjoy reading books about navigation.
In this sentence, '航海' reflects the activity or undertaking of sailing or navigating the seas.
航海需要经验和勇气。
Navigating seas requires experience and courage.
Here, '航海' relates to the planning and execution of a maritime voyage or journey.