arbaitol

例句：

1. 1. The doctoradministered a local anesthetic to numb the area before surgery.
   医生在手术前给病人注射了局部麻醉药以麻醉该区域。
2. 2. He took a sedative to help him sleep better.
   他服用了镇静剂以便更好地入睡。
3. 3. Narcotics are illegal drugs that can cause addictionand dependence.
   麻醉药是非法药物，会导致成瘾和依赖。