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
Hello. This is Richard Stewart.
你好, 我是Richard Stewart。
One boy is more trouble than a dozen girls.
一个男孩比十二个女孩还要麻烦。
Look at Mr Thin. He was poor. He didn't have much money.