swayback

n.(兽类的)背部过份凹陷adj.背部下凹了的,弄伤了背的

（指马匹的）腰部塌陷；曲臂；驼背

名词

1. The horse had a noticeable swayback, which affected its ability to carry a rider comfortably.
这匹马的腰部有明显的塌陷，这影响了它承载骑手的舒适度。
2. The old man walked with a slight swayback, a result of years of hard labor.
这位老人因多年的辛勤劳动而步态带有轻微的驼背。