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
How much will it be?
要多少钱?
Today is the first day of spring.
今天是春天的第一天。
And so do you, if you're afraid, and if the earthquake's a big one.