open belt

例句：

1. 1. The baby boy is wearing an open belt.
   那个婴儿男孩穿着开裆裤。
2. 2. She wore an open belt to the party.
   她穿着开裆裤去参加派对。
3. 3. He was wearing an open belt when he fell off the horse.
   他骑马时摔下来，穿着开裆裤。