cam
noun /kæm/
/kæm/
- a part on a wheel that sticks out and changes the circular movement of the wheel into up-and-down or backwards-and-forwards movement
凸轮（把圆周运动转变为上下或前后运动的机械部件） - (especially in compounds
尤用于构成复合词 计算机辅助制造；电脑辅助制造 - a video/digital/traffic cam
视频/数字/交通摄像头 - The police now have helmet cams—small video cameras attached to their headgear.
警察现在有头盔摄像头——附在头盔上的小型摄像机。
- a video/digital/traffic cam
词源late 18th cent.: from Dutch kam ‘comb’, as in kamrad ‘cog wheel’.