permanent structure

例句：

1. 1. The company's commitment to sustainability is a permanent feature of its culture.
   该公司对可持续性的承诺是其文化的一个永久特征。
2. 2. The river flows through the city, providing a permanent source of water for the residents.
   这条河流流经城市，为居民提供了永久的水源。
3. 3.The construction project will last for several years, creating a permanent structure in the area.
   这个建设项目将持续数年，在该地区创造一个永久性的结构。