If you're talking about tranquilizer darts, you're probably referring to the kind that are shot out of an air rifle using compressed gas, though they can also be fired from crossbows or blowguns.

如果你镇静剂飞镖，你可能指使用压气体从气步枪中射出那种， 尽管可以用十字弓或吹气枪发射。