a few dose of Ketamine的用法和样例：
- "We only had a small amount of APT102 to test, so in this set of experiments, we gave only a few doses of the drugs to the mice," Ulu鏺an explains.
- Only a few of my friends were informed about it.
- A whiff of ether will put you out in a few seconds.
- A few of people were browsing in the bookstore.
- Quite a few of our sale staff are women.
- Biologists have known for 40 years that a virus will cause less damage to a plant if that plant has been inoculated with a mild dose of the pathogen a few days earlier.