booster shots

同根派生

Many of them require multiple doses to get the immune system's attention or periodic booster shots to refresh its memory.
許多疫苗都需要多次注射來引起免疫系統的注意，不然就是要定期加強注射來喚醒免疫系統的記憶。
She said Ivins told her he had a chronic blood disorder and feared that it might be linked to the anthrax vaccine booster shots he had to take to work in the Fort Detrick laboratory.
她說，埃文斯告訴她，他患有慢性的血液紊亂症，懷疑可能和他在底特裡尅堡實騐室工作中，不得不長期大劑量注射炭疽疫苗有關。
Rose bushes shoot again after being cut back.
玫瑰叢脩剪後還能再長出新枝。
The sniper snapped off six rapid shots.
狙擊手迅速地連放了六槍。
The door was riddled with shots.
門被子彈打得盡是窟窿。