cam
n
projecting part on a wheel designed to change the circular motion of the wheel as it turns into up-and-down or backwards-and-forwards motion of another part 凸轮(轮上的凸起部件, 用以使轮的圆周运动转变成另一部件的上下或前後运动).
🗣️ 情景例句
Right. What's old?
对了, 旧的东西是什么?
Did you go to the hospital last night?
你昨晚去医院了吗?
You must be more careful! That car nearly hit you.