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English definition of “have/keep (all) your wits about you”

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have/keep (all) your wits about you

to be ready to think quickly in a situation and react to things that you are not expecting: Cycling is potentially very dangerous in the city - you have to keep your wits about you.
Translations of “have/keep (all) your wits about you”
in Chinese (Traditional) 保持頭腦冷靜, 隨機應變…
in Chinese (Simplified) 保持头脑冷静, 随机应变…
(Definition of have/keep (all) your wits about you from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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