large and medium-sized state owned enterprises

例句：

1. 1. These large and medium-sized state owned enterprises are crucial to the country's economic development.
   这些大型和中型国有企业对国家经济发展至关重要。
2. 2.The government is considering expanding its state-owned enterprises to attract more foreign investment.
   政府正在考虑扩大其国有企业以吸引更多外国投资。
3. 3.The state-owned enterprises have been facing challenges in adapting to the changing market demands.
   国有企事业单位在适应市场变化方面面临挑战。