优卡因

例句：

1. 1.The doctor gave me a small dose ofmorphine to relieve my pain.
   医生给了我一小剂量的吗啡来缓解我的疼痛。
2. 2. The patient was given an injectionof sedative to help himrelax.
   病人被注射了镇静剂以帮助他放松。
3. 3. The surgery required the useof anesthetic to ensure the patient's comfort.
   手术需要使用麻醉剂以确保患者的舒适。