optimization and upgrading的用法和樣例：
例句
- The government did hard work at accelerating the optimization and upgrading of the industrial structure.
政府在加快產業結構優化升級方面不辭辛苦。 - Optimization of industry structure refers to the process in which the industry structure of an area evolves in the direction of rationalization.
摘要產業結構優化升級是指特定區域的產業結構向合理化和高度化方向不斷發展演進的過程。
