One theory is that it is a spy plane, designed to catch savvy targets that know how to go to ground when spy satellites—which have predictable orbits—are overhead.
这些精明的目标发现间谍卫星（有可预见的轨道）位临上空时，能够知道如何隐蔽自己。
The geometrical theory of diffraction (GTD) has been used to calculate the Roll-Plane (Equatorial-Plane) radiation of the one and two vertical monopole elements on the base of the cone.
本文应用几何绕射理论(GTD)，计算了圆锥底上一元和二元垂直单振子滚动面(赤道面)的辐射图。
One of those pieces – a wing flap found on a shore in Tanzania – seemed to confirm the theory that no one was at the controls of the plane in its final moments.
现有的残骸之一是在坦桑尼亚被冲上岸的一块襟翼，似乎证实飞机在坠海前无人控制。
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