defense industrys

例句：

1. 1. The defense industry is a critical sector of the economy.
   国防工业是经济中的关键部门。
2. 2. The development of new technologies in defense industries has been a focus of recent research.
   国防工业新技术的开发是近期研究的重点。
3. 3. The defense industry employs millions of people worldwide, providing significant economic benefits.
   国防工业在全球雇佣了数百万人，提供了巨大的经济利益。