名词
中文翻译：中心层
同义词：
['core layer', 'core zone例句：1. The central layer of the soil is where most nutrients are stored.（土壤的核心层是储存大多数养分的地方。）']
例句：
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1. The central layer of the soil is where most nutrients are stored.
土壤的核心层是储存大多数养分的地方。
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2. The central layer of the city's infrastructure is crucial for its functioning.
城市基础设施的核心层对于其运作至关重要。
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3. The central layer of the cake is where the filling is placed.
蛋糕的核心层是放置填充物的地方。