【中文版】

主营业务是指一个企业在经营活动中所主要从事的业务活动，通常是企业获取收入和利润的主要来源。它是企业赖以生存和发展的基础，也是企业核心竞争力的重要体现。

对于一个企业来说，主营业务是它的核心业务，是企业实现长期发展和持续盈利的重要基础。主营业务不仅能够满足市场需求，而且能够使企业具备独特的竞争优势。通常来说，主营业务是企业竞争力最强的业务，是企业能够长期稳定发展的关键。

主营业务通常包括企业的主导产品、服务项目、产业链环节等。例如，对于制造企业来说，其主营业务可能是生产某种特定类型的机械或设备；对于零售企业来说，其主营业务可能是向消费者销售各种商品或服务。

企业需要明确自身的核心竞争力，并不断优化和拓展主营业务，以实现可持续发展和长期价值创造。在市场竞争日益激烈的今天，主营业务对于企业的生存和发展至关重要。因此，企业应该加强对主营业务的投入和研发，不断提高产品的质量和性能，以满足市场需求，并保持领先地位。

【英文版】

Main business refers to the core business activities engaged in by an enterprise in its business operations, which is usually the main source of income and profit for the enterprise. It is the basis for the survival and development of the enterprise, as well as an important manifestation of the core competitiveness of the enterprise.

For an enterprise, its main business is its core business, which is an important basis for achieving long-term development and sustainable profitability. Main business can not only meet market demand, but also enable the enterprise to have unique competitive advantages. Typically, main business is the most competitive part of the enterprise's business, and is the key to the long-term stable development of the enterprise.

Main business usually includes the leading products, service items, and industry links of the enterprise. For example, for manufacturing enterprises, their main business may be to produce a specific type of machinery or equipment; for retail enterprises, their main business may be to sell various products or services to consumers.

Enterprises need to identify their core competitiveness, and continuously optimize and expand their main business to achieve sustainable development and long-term value creation. With increasingly fierce market competition today, main business is crucial for the survival and development of enterprises. Therefore, enterprises should strengthen investment and research and development in their main business, continuously improve product quality and performance to meet market demand, and maintain a leading position.