Nmap is an extremely flexible tool that can do active and passive scanning of remote (and local) systems.
Nmap是一个非常灵活的工具，它可以主动或被动地扫描远程(和本地)系统。
In this paper, combining the advantages of active light vision technology and passive light vision technology, an optical system of circular scanning laser vision sensor was developed.
本文结合主动光视觉技术和被动光视觉技术的优点，开发了环形扫描激光视觉传感器的光学系统。
The type of scanning can be passive, active or user-directed.
扫描类型有被动，主动，后者是用户自定义。
The type of scanning can be passive, active or user-directed.
扫描类型有被动，主动，后者是用户自定义。
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