副词
中文翻译：主要地
同义词：
['predominantly', 'chiefly', 'primarily例句：1. The main reason for the delay is due to heavy traffic.（延误的主要原因是由于交通拥堵。）']
例句：
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1. The main reason for the delay is due to heavy traffic.
延误的主要原因是由于交通拥堵。
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2. Mainly, I enjoy reading books and watching movies.
我主要喜欢读书和看电影。
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3. The company's main product line is electronics.
该公司的主要产品线是电子产品。