Night vision tubes built into video cameras made it possible—the same technology that outdoor enthusiasts use to spot nocturnal animals or buoys on midnight waters and that police use to observe crooks in shrouded doorways.
Night vision tubes built into video cameras made it possible—the same technology that outdoor enthusiasts use to spot nocturnal animals or buoys on midnight waters and that police use to observe crooks in shrouded doorways.
使用同样的技术，户外活动爱好者可以观察夜行动物或夜半水面上的浮标，而警察也能在掩蔽的门廊外监视坏人的行动。