名词
中文翻译：内部阶段
同义词：
['internal period', 'internal stage']
例句：
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1.The research team is currently working on the internal phase of the project.
研究团队目前正在进行项目的内部阶段工作。
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2. During the internal phase, the company was focused on refining its processes.
在内部阶段，公司专注于完善其流程。
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3. The internal phase of the project is crucial for success.
项目的内部阶段对于成功至关重要。