hobbyhorse
n. (旋转木马台上的)木马；摇动木马；反复爱讲的话题
近义词：favouritesubject，thing，obsession，preoccupation，hobby，rockinghorse，
英英释义
Noun
- a topic to which one constantly reverts;
"don't get him started on his hobbyhorse"
- a child's plaything consisting of an imitation horse mounted on rockers; the child straddles it and pretends to ride
例句
用作名词(n.)
- This system is a hobbyhorse procedure, but we do the beneficial thing with it.本系统属于木马程序，但我们用它来做有益的事。