| 单词 | booster |
| 释义 | boosterboostersboosterbooster /ˈbuːstə $ -ər/ noun [countable]1something that increases or improves something, especially a person’s confidence: His speech was a real morale booster.be 他的演讲大大激励了士气。 2a small quantity of a drug that increases the effect of one that was given before3a rocket that provides extra power for a spacecraft |
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