international air space

例句：

1. 1.The international air space is a complex and ever-changing environment.
   国际空域是一个复杂且不断变化的环境。
2. 2.The aircraft must comply with the rules of international air space.
   飞机必须遵守国际空域的规则。
3. 3. The international air space is a shared resource for all countries.
   国际空域是所有国家共享的资源。