名词
中文翻译：Unknown
同义词：
['primary stage', 'principal period', 'primary phase']
例句：
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1. The development of the new technology is at a principal phase.
新技术的发展正处于主要阶段。
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2. During the initial stages of the project, we need to focus on the design.
在项目初期阶段，我们需要专注于设计。
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3. The growth of the company has entered its principal phase.
公司的增长已经进入了主要阶段。