with one's pant down

例句：

1. 1. She wore a long black pant to the party.
   她穿着一条长黑色裤子去参加聚会。
2. 2. The man was wearing a white shirt and blue pants.
   那个人穿着一件白衬衫和蓝色裤子。
3. 3. He put on his coat and trousers before leaving the house.
   他离开家前穿上了外套和裤子。