slit fricative

例句：

1. 1. The book has a slit in the back for easy reading.
   这本书背面有一个缝隙，方便阅读。
2. 2. The dress has a slit down the side for easy movement.
   这件衣服侧面有一个缝隙，便于活动。
3. 3. The old clock had a slit in its case for oiling.
   旧时钟的外壳有一个缝隙用于加油。