他们知道他们是“黑夜的主宰”——他们的无人驾驶飞机能扫描地面上的一切行动，不论白天或黑夜都能捕捉到一些信息，而它还拥有能透视云层的雷达装置。
They know that with drone aircraft scanning the ground, with unblinking eyes able to see by day or night and radars that can see through cloud, they “own the night”.
这个地牢是在砂岩上凿刻而成的，地牢(图片下方)的位置在英国诺丁汉城堡(图片上方)的下面。地牢经过镭射扫描制成3d图片，并叠加在地面建筑图片上显现。
Carved from sandstone, the dungeon (foreground) beneath England's Nottingham Castle (top) -scanned in 3-d via lasers-is superimposed on an image of the aboveground buildings.
当你这些地区的做法，缓慢的步伐，重点放在最遥远的地面您的视觉，扫描该地区。
As you approach these areas, slow your pace and focus your vision on the most distant ground, scanning the area.
应用推荐