名词
中文翻译：内部的
同义词：
['inside', 'inner', "interior例句：1. The engineer inspected the internal parts of the machine.（工程师检查了机器的内部部件。）2. The company's headquarters are located in the internal city center.（公司的总部位于市中心的内城。）"]
例句：
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1. The engineer inspected the internal parts of the machine.
工程师检查了机器的内部部件。
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2. The company's headquarters are located in the internal city center.
公司的总部位于市中心的内城。
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3. The scientist conducted an internal study to determine the effectiveness of the new drug.
科学家进行了一项内部研究，以确定新药的有效性。