名词
中文翻译：主要部分
同义词：
['main part', 'principal part', 'essential part']
例句：
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1. The major of the project is to improve efficiency.
这个项目的主要目标是提高效率。
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2. The main reason for his success was his hard work.
他成功的主要原因是他的勤奋工作。
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3. The major problem with this plan is its complexity.
这个计划的主要问题是它的复杂性。