| 单词 | booster |
| 释义 | boosterbooster /ˈbustɚ/ noun [countable] 1a small quantity of a drug that increases the effect of one that was given before so that someone continues to be protected against a disease: You will need a booster in six weeks’ time.2confidence/ego/morale etc. booster something that helps someone be more confident or less worried3someone who gives a lot of support to a person, organization, or an idea: the Kennedy High School Booster Club4a rocket that is used to provide additional power for a spacecraft to leave the Earth |
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