名词中文翻译
中文翻译：空心的内核
同义词：
['hollow center', 'hollow core']
例句：
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1.The hollow kernels of the tree were filled with sap.
这棵树的空心内核充满了树液。
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2. The hollow kernels are a great source of energy.
空心内核是极好的能源来源。
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3.The hollow kernels are used to make musical instruments.
空心内核被用来制作乐器。