名词中文翻译
中文翻译：主要时期
同义词：
['major period', 'primary period例句：1. The principal period of the project is from January to June.（项目的主期是从一月到六月。）2. During the principal period', 'the company focused on expanding its market share.（在主期，公司专注于扩大市场份额。）']
例句：
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1. The principal period of the project is from January to June.
项目的主期是从一月到六月。
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2. During the principal period, the company focused on expanding its market share.
在主期，公司专注于扩大市场份额。
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3.The principal period for this research is the development and implementation phase.
这项研究的主期是发展和实施阶段。