buttock lines

例句：

1. 1. She's always been proud of her buttock lines.
   她一直为自己的臀部线条感到骄傲。
2. 2. I think you should pay more attention to your buttock lines.
   我认为你应该更多地关注你的臀部线条。
3. 3.The model showed off her buttock lines in a new fashion show.
   这位模特在一个新的时装秀上展示了她的臀部线条。