injection block

例句：

1. 1.The drug is an injection blocker for the pain relief system.
   这种药物是用于缓解疼痛的注射阻断剂。
2. 2. The research team discovered a new injection blocker that can prevent infection.
   研究小组发现了一种新的注射阻断剂，可以预防感染。
3. 3. The patient was given an injection blocker to help control his pain.
   患者被给予一种注射阻断剂来帮助控制他的疼痛。