Their thermal vision, so to speak, had been restored.

也可以说是，他们的热视力已经恢复了。

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Thee FLIR Scout TK thermal vision monocular, the smallest and lightest camera in the FLIR Scout series, is developed specifically for outdoor enthusiasts.

FLIR侦察兵TK热成像单目摄像机，是FLIR侦察兵系列中最小和最轻的，是专门为户外爱好者而开发的。

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And individual soldiers are identifiable via infra-red tabs which can be picked out by thermal imaging and night vision cameras before an area is bombed.

BBC: NEWS | UK | No easy fix for 'friendly fire'

It also uses a tether and can stay aloft for 12-hours on a single ground-station battery, letting it spy from afar with on-board HD, night-vision and thermal cameras.

ENGADGET: CyPhy Works reveals tethered flying bots that can spy on you indefinitely (video)

In fact, some models produced by the American car manufacturer Cadillac already have limited night vision systems using thermal imaging, but they require the driver to look away at a separate display.

BBC: Cars which see in the dark