门钉

例句：

1. 1. The door is held shut by a single nail.
   这扇门由一个钉子固定。
2. 2. He hammered the nail into the wood.
   他用力将钉子敲入木头。
3. 3. She carefully placed the nail in the wall.
   她小心翼翼地把钉子放在墙上。