名词
中文翻译：内核
同义词：
['core', 'center', 'nucleus例句：1. The kernel of the problem is that we need to find a solution.（问题的核心是我们需要找到一个解决方案。）']
例句：
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1. The kernel of the problem is that we need to find a solution.
问题的核心是我们需要找到一个解决方案。
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2. The scientist discovered a new type of kernel for the seeds.
科学家发现了一种新的种子内核。
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3. The kernel of this theory is that it explains why the earth moves around the sun.
这一理论的核心是它解释了地球为什么会绕太阳转动。