Add to those covered up achievements the recently revealed technologies such as through the wall radar, airport criminal intent detectors, and electronic sight for the blind.

关于那些掩盖住的成就，今天显露出的那些技术，例如穿透墙壁的雷达，机场犯罪意图探测器，以及盲人用的电子视力。

youdao

Considering radar as a point in variational target body coordinate, we can study the azimuth and elevation of line of sight of radar in target body coordinate.

将雷达转换为姿态角不断变化的目标体坐标系下一点，研究雷达视线在目标体坐标系下的方位和高低角。

youdao

Furthermore, meteor trails scattering can affect the performance of a beyond-light-of-sight radar system.

最后研究了流星余迹散射对超视距雷达性能的影响。

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Not least because these huge exchanges of information and ideas are all taking place below the radar - out of sight of the traditional media.

BBC: If your face fits