名词
中文翻译：内龙骨
同义词：
['inner frame', "inner structure例句：1. The boat's inner keel is the most important part of its design.（船的内龙骨是其设计中最关键部分。）"]
例句：
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1. The boat's inner keel is the most important part of its design.
船的内龙骨是其设计中最关键部分。
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2. The inner keel of the ship is made of steel and reinforced with iron.
船的内部骨架由钢制成，并被铁加固。
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3. The inner keel supports the weight of the vessel and helps it maintain stability.
内部骨架支撑着船只的重量，帮助它保持稳定。