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 凸輪(輪上的凸起部件, 用以使輪的圓周運動轉變成另一部件的上下或前後運動).
??? 情景例句
Lots of movie houses, and the theater.
很多電影院 還有劇院。
How tall?
多高?
Oh, dear! said Miss Yang. Are you sure you've lost it?