Word: 彗星 (huìxīng) 彗星 dictionary entry huìxīng comet Full dictionary entry for 彗星 Example sentences using 彗星 2 sentences, showing page 1 of 1. 彗星多久会回来一次？ Huìxīng duōjiǔ huì huílai yícì? How often does a comet come back? 彗星的尾巴为什么那么长？ Huìxīng de wěiba wèishénme nàme cháng? Why is a comet's tail so long?