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
May I use a knife and fork please?
我可以用刀叉吗?
Better a little fire to warm us, than a great one to burn us.
适量的火好取暖,熊熊烈火能焚身。
I don't know whether you care to answer right away.