renewal and upgrading of fixed assets

例句：

1. 1.The company is investing heavily in the renewal and upgrading of its fixed assets.
   该公司正在大力投资于其固定资产的更新改造。
2. 2.The factory has been undergoing a comprehensive renewal and upgrading of its production facilities.
   这家工厂正在进行全面的生产设施更新改造。
3. 3.The government is committed to enhancing the efficiency and quality of its fixed assets through continuous renewal and upgrading.
   政府致力于通过持续的更新改造，提高其固定资产的效率和质量。