【中文版】

主营业务收入是指企业销售商品和提供劳务所得到的收入净额。通俗来说，主营业务收入就是企业销售收入扣除折扣、销售折让、销售退回等各项费用之后的净额。

主营业务收入是衡量一个企业经营业绩的重要指标，它反映了企业产品或服务的市场价值和市场占有率。不同行业的主营业务收入来源和表现方式也有所不同。例如，制造业的主营业务收入主要来自于产品销售，而服务业的主营业务收入则主要来自于提供劳务。

企业想要提高主营业务收入，首先要提高产品或服务的质量和竞争力，同时要关注市场变化和政策变化，及时调整经营策略。此外，加强内部管理和降低成本也是提高主营业务收入的重要手段。

总之，主营业务收入是反映企业经济实力和市场竞争力的重要指标，企业应该注重提高产品或服务的质量和竞争力，适应市场需求变化和政策变化，以提高主营业务收入。

【英文版】

The main business income refers to the net amount of income derived from the sale of goods and provision of services by an enterprise. In simple terms, main business income is the net amount of enterprise sales revenue after deducting various expenses such as discounts, sales allowances, and sales returns.

Main business income is an important indicator for measuring an enterprise's operating performance, reflecting the market value and market share of the enterprise's products or services. The source and manifestation of main business income are different in different industries. For example, the main business income of the manufacturing industry mainly comes from product sales, while the main business income of the service industry mainly comes from providing services.

To increase main business income, enterprises need to improve the quality and competitiveness of their products or services, while also paying attention to market changes and policy changes and adjusting business strategies in a timely manner. In addition, strengthening internal management and reducing costs are also important means to increase main business income.

In summary, main business income is an important indicator reflecting the economic strength and market competitiveness of an enterprise. Enterprises should focus on improving the quality and competitiveness of their products or services, adapting to market demand changes and policy changes, and increasing main business income.