请翻译成英文：为此应在强化技术创新对城市群绿色发展效率提升的核心驱动功能提高技术效率和规模效率对城市群绿色发展效率的贡献程度、缩小城市群绿色发展效率的空间差异等方面做好工作。

For this reason, efforts should be made to strengthen the core driving function of technological innovation in improving the efficiency of green development in urban clusters. This includes enhancing the contribution of technological efficiency and scale efficiency to the efficiency of green development in urban clusters, as well as reducing the spatial differences in green development efficiency among urban clusters.