self-impinging injector

例句：

1. 1. The self-impacting injector was designed to deliver drugs directly into the bloodstream.
   这种自冲击注射器被设计用来直接将药物输送到血液中。
2. 2. The self-impacting injector is a medical device that can be used to administer medication.
   这种自冲击注射器是一种医疗设备，可以用来给药。
3. 3. The self-impacting injector has been shown to be effective in treating certain types of cancer.
   这种自冲击注射器已被证明在治疗某些类型的癌症中是有效的。