Task: Translation
Input (English): Such high speed will be impossible for the current test vehicles and any launched in the foreseeable future, as they rely on the light from the Sun, which rapidly becomes weaker with increasing distance.
Output (Chinese): 对于当前的测试车辆以及在可预见的未来发动的任何测试车辆来说，这样的高速度是不可能的，因为它们依赖于来自太阳的光线，随着距离的增加，太阳光线会迅速变弱。