water injection coarse filtration package

例句：

1. 1. The doctor administered an injection of painkillers to the patient.
   医生给病人注射了止痛药。
2. 2.The chemical was injected into the water supply to treat the contamination.
   这种化学物质被注入供水系统来处理污染。
3. 3. The nurse gave the patient an injection of antibiotics for his infection.
   护士给病人注射了抗生素以治疗他的感染。