a slow-burning gunpowder的用法和样例：
- Bartling turned red and began a slow burn.
- They kept teasing Peter,and watched him do a slow burn.
- I did a slow burn while I was getting my money back.
- I did a slow burn and finally got furious with him two hours after he left.
- This position offers what we call a slow burn, it allows sexual pleasure to build up slowly and results in an intense and intimate clitoral orgasm.