副词
中文翻译：主要地
同义词：
['predominantly', 'predominantly', 'chiefly']
例句：
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1.Mainly, I enjoy reading books about history.
我主要喜欢阅读关于历史的书籍。
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2. The main reason for the delay was due to a lack of resources.
延误的主要原因是因为资源不足。
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3.The team's performance was mainly due to their hard work and dedication.
团队的表现主要是他们辛勤工作和奉献的结果。