a candle butt的用法和样例：
- She was reading by the light of a candle.
- A candle lights others and consumes itself.
- The light of a candle is dimmed by sunlight.
- She is pretty good, but she can't hold a candle to her mother.
- He climbed into a cave and with the help of a candle he saw into it.
- A teacher's work is often compared to a candle.