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
That's easy.
这很容易。
During the two years since I took charge of the department.
在我负责这个部门的两年中。
Spiders are busy for at least half the year in killing insects.