a stick of butter的用法和样例：
- When you report the thieves stole a stick of butter and left the TV and VCR alone, the police will conclude that you are a mental case.
- He was eating a stick of celery.
- I threw a stick of charcoal in the fire.
- I will buy you a stick of chocolate.
- The monk burned a stick of incense in the incense burner.
- A stick of phosphorus fell on the floor.