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| NOUN |
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| /ˈbuːstə/ |
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| 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。 | |
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| 2 | 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 | |
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| 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 |
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| 4 | AMERICAN someone who publicly supports a person , plan , or organization 热心支持者；拥护者 |
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