region of ultimate boundedness

例句：

1. 1.The region's economy is booming.
   该地区的经济正在蓬勃发展。
2. 2. This region has a rich history and culture.
   这个地区有着丰富的历史和文化。
3. 3. The region is home to many different species of plants and animals.
   这个地区栖息着许多不同的植物和动物种类。