名词
中文翻译：内部
同义词：
['inner', 'innermost', 'core']
例句：
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1.The book is inside the box.
书在盒子里。
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2.She kept her secret to herself because she didn't want anyone to know.
她保守秘密，因为她不想让任何人知道。
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3.The tree was leaning towards the ground and the branches were inside the trunk.
这棵树倾斜着，树枝在树干里面。