tappet

例句：

1. 1.The artist carefully tied a knot in the string to hold it in place.
   艺术家小心翼翼地在绳子上打了个结，以固定它。
2. 2.The spool of thread is ready for you to wind it around your fingers.
   线轴准备好了，你可以把它绕在你的手指上。
3. 3. The little girl was so excited that she couldn't wait to try her new hairpin.
   小女孩非常兴奋，迫不及待地想要试试她的新发夹。