knee rafter

例句：

1. 1. She sat on the knee rafter to rest her aching legs.
   她坐在膝盖横梁上休息她的酸痛的腿。
2. 2.The knee rafter was designed to provideextra support for athletes during their workouts.
   膝盖横梁的设计是为了在运动员锻炼时提供额外的支持。
3. 3. The knee rafter is anessential part of any gymnastics apparatus.
   膝盖横梁是任何体操器械中必不可少的一部分。