这种系统据称还是完全静音的，地基或空基雷达很难探测到。
The system is reportedly 100 percent silent and extremely difficult to track by air on ground-based radar systems.
“雷电之神”大约有小型喷气式教练机那么大，但隐形轰炸机般的外表使得雷达很难探测到它。
Taranis is about the size of a small jet trainer, but with the look of a stealth bomber to make it hard to detect on radar.
F190与其伴星的质量比在5左右，因此，除非有非常高的信噪比，否则我们很难探测到来自伴星的信息。
The mass ratio of F190 to its companion is about 5, which means that it is difficult to obtain the information of the companion except for a very high S/N.
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