free-space power

例句：

1. 1.The new satellite has a free-space power of 100 watts.
   新卫星的自由空间功率为100瓦。
2. 2.In this experiment, we used the free-space power to measure the distance between the two objects.
   在这个实验中，我们使用自由空间功率来测量两个物体之间的距离。
3. 3. The free-space power is a crucial factor in determining the efficiency of the device.
   自由空间功率是决定设备效率的关键因素。