柄脚

例句：

1. 1. The chair has a comfortable backrest and sturdy handles.
   椅子有舒适的靠背和坚固的手柄。
2. 2. The dog's tail is a useful tool for gripping things.
   狗的尾巴是抓东西的好工具。
3. 3. The scientist used the new technology to improve the efficiency of their research.
   科学家利用新技术提高了他们的研究效率。