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English definition of “a shot in the arm”

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a shot in the arm

something that has a sudden, strong, positive effect on something: Winning this award has been a big shot in the arm for the students.
Translations of “a shot in the arm”
in Chinese (Traditional) 刺激因素,興奮劑…
in Chinese (Simplified) 刺激因素,兴奋剂…
(Definition of a shot in the arm from the Cambridge Academic Content Dictionary © Cambridge University Press)
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