海军 hǎijūn navy
How to remember 海军: 海 sea + 军 army = navy.
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How it is used
- Means the navy - 中国海军 (Zhōngguó hǎijūn) the Chinese Navy.
- One of the standard armed-forces triad: 陆军 (army), 海军 (navy), 空军 (air force).
- Also refers to a navy sailor/serviceman by extension.