metallic dental syringe

例句：

1. 1. Thismetal dental syringe is veryconvenient for cleaning the teeth.
   这个金属牙科注射器非常便于清洁牙齿。
2. 2. Thedentist used this metal dental syringe to remove a large filling from mytooth.
   牙医用这个金属牙科注射器从我的牙齿中取出了一个大填充物。
3. 3. The patient was given ametal dental syringe to helphim with his gum disease treatment.
   病人被给了一个金属牙科注射器来帮助他治疗牙龈疾病。