swaybacked的解释
形容词背凹了的，弄伤了背的
swaybacked
1. Every camper water-skied at the reservoir, played badminton with sore losers, and rode swaybacked old horses through the hills. 每个前来宿营的人要么在大水库里划水，要么就打羽毛球，要么就骑着被压弯了背的老马走过一座座小山丘。
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adj
1. having abnormal sagging of the spine (especially in horses)
Synonym: dipped lordotic swayback