pin clip

例句：

1. 1.She used a pin clip to hold her hair in place.
   她用一个夹子来固定她的发型。
2. 2. The teacher pinned up the notes on the board.
   老师把笔记钉在黑板上。
3. 3. He pinned his coat on with a safety pin.
   他用一枚安全别针别上了他的外套。