hobby-horse

n 1 long stick with a horse's head, used as a toy 马头杆子（玩具）; 竹马. 2 subject that a person likes to discuss; favourite topic of conversation （讨论、 交谈中）喜爱的话题: You've got me onto (ie talking about) one of my favourite hobby-horses. 你把我引到我喜爱的一个话题上来了.

HMSO, HNC, HND, ho, hoar, hoar-frost, hoard, hoarder, hoarding, hoariness, hoarse, hoarsely, hoarseness, hoary, hoax, hoaxer, hob, hob-nob, hobble, hobby, hobbyist, hobgoblin, hobnail, hobnailed, hobo, Hobson's choice, hock, hockey, hockey stick, hocus-pocus, hod, hodgepodge, hoe, hog, hog-wash, hoggish, hogmanay, hogshead, hoi polloi, hoick,