名词
中文翻译：Unknown
同义词：
['guardian', 'sentinel', 'lookout例句：1. The sentinel stood at the edge of the forest', 'watching for any danger.（哨兵站在森林的边缘，警惕着任何危险。）']
例句：
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3.
在航海中
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1. The sentinel stood at the edge of the forest, watching for any danger.
哨兵站在森林的边缘，警惕着任何危险。
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2. He is a sentinel at the gate, guarding against intruders.
他在大门处担任哨兵，防止入侵者。
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3.The sentinel kept watch over the castle, ensuring its safety.
哨兵在城堡周围巡逻，确保其安全。