名词
中文翻译：桶形核心
同义词：
['barrel', 'barrel core']
例句：
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1.The barrel core is the part of a barrel that holds the liquid inside.
桶形核心是桶内装液体的部分。
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2. The barrel core was made from a single piece of wood.
桶形核心是由一整块木头制成的。
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3.The barrel core was used to store wine in old times.
在古代，桶形核心被用来储存葡萄酒。