Emissions must be hidden and the plane's fuselage sculpted to avoid detection by radar and infrared sensors.
排放物必须隐藏起来，机身设计时也必须考虑到不能被雷达和红外探测器发现。
2
And it does that because of the way that gases reduce the emissions of infrared radiation to space by the Earth and its atmosphere.
这一现象的产生是因为这些气体使地球及其大气层散入到太空的红外线辐射减少了。
3
This makes sense for the reason that temperature oscillations or oscillating emissions from the metal surface often occur which would cause the infrared detector to trigger when it was not wanted.