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
I've been invited to give a talk at the conference.
我已受邀在大会上发言。
Which would you rather do--go dancing or go to a play?