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
She's never been happier.
她从来没有像现在这样快乐过。
You're too outspoken.
你太直率了。
There're usually a lot of parties on New Year's Eve.