a sleeping potion的用法和样例：
- I wouldn't even have had to give this soldier a sleeping potion.
- This wine is like a sleeping potion that kept the men asleep until morning.
- It was no wonder, for the physicians, by the Emperor's order, had mingled a sleeping potion in the hogsheads of wine.
- I took a sleeping pill and soon came over drowsy.
- The enemy came down on a sleeping village.
- A sleeping berth in one of these compartments.