【中文版】

费用率是一个用来衡量公司在运营中支出费用的比例，它反映了公司对费用的控制能力和管理能力。费用率通常包括管理费用率、销售费用率、财务费用率等。

管理费用率是指管理费用与营业收入之间的比例，它反映了公司管理层的效率和管理水平。管理费用包括员工工资、行政开支、固定资产折旧、广告宣传费用等。如果管理费用率过高，说明公司在管理上存在较大的浪费，需要加强费用控制和管理。

销售费用率是指销售费用与营业收入之间的比例，它反映了公司销售业务的成本和效率。销售费用包括销售人员工资、提成、广告宣传费用等。如果销售费用率过高，说明公司在销售业务上存在较大的浪费，需要加强费用控制和管理。

财务费用率是指财务费用与营业收入之间的比例，它反映了公司借款和融资的成本和效率。财务费用包括利息支出、手续费、汇兑损益等。如果财务费用率过高，说明公司在借款和融资上存在较大的成本压力，需要加强财务规划和管理。

通过观察费用率的变化，我们可以了解公司管理层在费用控制和管理方面的表现，以及公司的运营状况和发展趋势。因此，费用率是一个重要的财务指标，对于投资者和债权人来说具有重要的参考价值。

【英文版】

The operating expense ratio is a measure of a company's operating expenses as a proportion of revenue, reflecting the company's ability to control and manage its expenses. The operating expense ratio usually includes management expense ratio, sales expense ratio, financial expense ratio, etc.

The management expense ratio refers to the ratio of management expenses to operating revenue, reflecting the efficiency and management level of the company's management team. Management expenses include staff salaries, administrative expenses, fixed asset depreciation, advertising and promotion expenses, etc. If the management expense ratio is too high, it means that the company has significant waste in its management and needs to strengthen its cost control and management.

The sales expense ratio refers to the ratio of sales expenses to operating revenue, reflecting the cost and efficiency of the company's sales business. Sales expenses include sales staff salaries, commissions, advertising and promotion expenses, etc. If the sales expense ratio is too high, it means that the company has significant waste in its sales business and needs to strengthen its cost control and management.

The financial expense ratio refers to the ratio of financial expenses to operating revenue, reflecting the cost and efficiency of the company's borrowing and financing. Financial expenses include interest expenses, commission fees, exchange gains and losses, etc. If the financial expense ratio is too high, it means that the company has significant borrowing costs and needs to strengthen its financial planning and management.

By observing changes in the operating expense ratio, we can understand the performance of the company's management team in cost control and management, as well as the company's operating status and development trends. Therefore, the operating expense ratio is an important financial indicator and has important reference value for investors and creditors.