leaf spindle

例句：

1. 1. The tree's leaves spindle gently in the breeze.
   树叶在微风中轻轻摇曳。
2. 2. The scientist used a leaf spindle to measure the plant's growth rate.
   科学家用一根叶柄测量植物的生长速率。
3. 3. The artist crafted a leaf spindle into a delicate sculpture.
   艺术家将一根叶柄雕刻成一件精致的雕塑作品。