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BNC: 14487 COCA: 8144
booster
noun [C] /ˈbuːstə(r)/
singularbooster
pluralboosters
  1. 1
    something that makes you feel more confident, more healthy etc 令人鼓舞的事物;促进健康的事物

    Fruit is an excellent health booster. 水果是促进健康的好东西。

    confidence/morale booster :

    A new haircut can be a great confidence booster. 一个新发型可能会大大地增强信心。

     Synonyms and related words
    Advantages and benefits: advantage, benefit, good...
  2. 2
    medical a small extra amount of a medical drug that you are given so that a drug you had before will continue to be effective (增强旧药剂效力的)附加剂量,增效剂量

    a tetanus booster 破伤风的增效剂量

     Synonyms and related words
    Types and forms of medicine: amphetamine, anabolic steroid, anaesthesia...
  3. 3
    an extra engine on a spacecraft that gives it enough power to leave the Earth's atmosphere (宇宙飞船的)助推器,推进器
     Synonyms and related words
    Space vehicles and space travel: aerospace, Apollo, astronaut...

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