loose fold

例句：

1. 1.The dress has a loose fold at the waist.
   这件衣服在腰部有一个松散的褶皱。
2. 2.The book has a loose fold in the middle.
   这本书中间有一个松散的折痕。
3. 3.The tablecloth has a loose fold at the center.
   桌布中间有一个松散的折痕。