free space wavelength

例句：

1. 1. The newsatellite's free-space wavelength is 200 meters.
   新卫星的自由空间波长为200米。
2. 2.The measurement of the free-space wavelength is crucial for the accuracy of the experiment.
   自由空间波长的测量对于实验的准确性至关重要。
3. 3.In the context of telecommunications, the free-space wavelength plays a significant role in determining signal strength.
   在电信领域，自由空间波长在确定信号强度方面起着重要作用。