名词
中文翻译：主要业务线
同义词：
['mainstream', "core business例句：1. The company's main business line is in manufacturing electronics.（该公司的主要业务线是制造电子产品。）"]
例句：
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1. The company's main business line is in manufacturing electronics.
该公司的主要业务线是制造电子产品。
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2.The new product is the main business line for this year's marketing campaign.
新产品是今年营销活动的主要业务线。
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3. The company has been focusing on its main business line to improve efficiency.
公司一直专注于其主要业务线以提高效率。