feather joint

例句：

1. 1. The bird's feather joint is visible through the glass.
   鸟的羽毛关节通过玻璃可见。
2. 2. The artist used a feather joint to create the sculpture.
   艺术家使用羽毛关节创作了这个雕塑。
3. 3.The dancers performed a feather joint routine.
   舞者们表演了一个羽毛关节舞蹈。