chewing

例句：

1. 1. She chewed her food thoroughly before swallowing.
   她吃东西前彻底咀嚼。
2. 2. The dog was chewing on a bone when it suddenly stopped.
   狗在啃骨头时突然停了下来。
3. 3. He chewed his nails for hours before going to bed.
   他花了好几个小时啃指甲才去睡觉。