booster shots

英 美
  • 加强注射
  • booster n.支持者;助推器;辅助药剂
  • shots n.注射;投篮;发射;拍摄;开枪;子弹adj.(织物)闪色的;精疲力尽的;完了的动词shoot的过去式和过去分词.
名词 booster shot:
  1. an additional dose that makes sure the first dose was effective