frontier orbital

例句：

1. 1. The frontier orbital is a critical area for space exploration.
   边疆轨道是太空探索的关键区域。
2. 2. The frontier orbital has been the subject of much debate and research.
   边疆轨道一直是争论和研究的焦点。
3. 3. The frontier orbital is a complex system that requires careful analysis.
   边疆轨道是一个复杂的系统，需要仔细分析。