“只在地面的”可以翻译为“ground-level only” 或者 “solely on the ground” ,具体使用哪种表达可根据上下文语境来决定。例如:
This equipment is designed for ground-level only operations.(这件设备仅设计用于地面操作 。)
The security check is solely on the ground, not involving any aerial surveillance.(安检工作只在地面进行,不涉及任何空中监视。)