随着ADS - B在全球范围的使用，它改进了空管人员和飞行员用于确定附近飞机位置和速度的雷达系统。
Gradually being deployed worldwide, ADS-B improves upon the radar-based systems that air traffic controllers and pilots rely on to find out the location and velocity of aircraft in their vicinity.
如果电子在真空里流动，比如电子真空管，那么电子的运行速度非常快，因为介质对电子几乎不产生什么阻力。
If the electron flow takes place in a vacuum, as in the case of electronic valve, the electrons will travel at considerable speed, since little resistance is offered the medium.
他的飞船以极高的速度进入大气层，快到空管AI将其标记为了一个火球。 考虑到他直接冲向了大使馆，显然事实上他并没有收到任何预警。
His ship entered their atmosphere so fast air traffic AI registered it as a fireball and considering the beeline he made to the embassy, he must've had virtually no warning.
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