名词中文翻译
中文翻译：自然防御工事
同义词：
['natural defenses', "natural fortresses例句：1. The city's natural fortifications are a testament to its rich history.（城市的自然防御工事是其丰富历史的一个证明。）2. The ancient fortifications still stand as a reminder of the battles fought there.（古老的防御工事仍然屹立，提醒着人们那里曾经发生过的战斗。）"]
例句：
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1. The city's natural fortifications are a testament to its rich history.
城市的自然防御工事是其丰富历史的一个证明。
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2. The ancient fortifications still stand as a reminder of the battles fought there.
古老的防御工事仍然屹立，提醒着人们那里曾经发生过的战斗。
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3.The natural fortifications around the castle provide excellent protection against intruders.
城堡周围的自然防御工事为入侵者提供了极好的保护。