regional security

例句：

1. 1. The region's economy is booming.
   该地区的经济正在蓬勃发展。
2. 2.The company has a regional presence in several countries.
   该公司在几个国家都有地区性的存在。
3. 3.The region's climate is characterized by hot summers and cold winters.
   该地区的气候以炎热的夏天和寒冷的冬天为特征。