stud pin

例句：

1. 1.The student pinned his name on the wall with a piece of paper.
   学生用一张纸把名字钉在墙上。
2. 2. He used a stud pin to fasten the door shut.
   他用一个钉子把门钉紧了。
3. 3.She was so proud of her new stud pins that she wore them everywhere.
   她为自己的新钉针感到非常自豪，以至于她到处都戴着它们。